Update terminology: Change 'fundamental concept' to 'key concept' in composition and association READMEs across all language folders

Rahul Singh · Rahul Singh · commit e3bfd212d518 · 2025-05-13T17:32:02.000+05:30
diff --git a/oop/csharp/association/README.md b/oop/csharp/association/README.md
@@ -2,7 +2,7 @@
 
 ## Introduction
 
-Association is a fundamental concept in object-oriented programming (OOP) that defines a relationship between two or more objects. It represents how objects interact with each other while maintaining their independence.
+Association is a key concept in object-oriented programming (OOP) that defines a relationship between two or more objects. It represents how objects interact with each other while maintaining their independence.
 
 Association is **not inheritance**—rather, it is a relationship between objects that allows communication while ensuring they remain loosely coupled.
 
diff --git a/oop/csharp/composition/README.md b/oop/csharp/composition/README.md
@@ -2,7 +2,7 @@
 
 ## Introduction
 
-Composition is one of the fundamental principles of object-oriented programming (OOP). It allows objects to be built using other objects, promoting code reuse, flexibility, and better maintainability. Unlike inheritance, which establishes an "is-a" relationship, composition represents a "has-a" relationship.
+Composition is one of the key concepts of object-oriented programming (OOP). It allows objects to be built using other objects, promoting code reuse, flexibility, and better maintainability. Unlike inheritance, which establishes an "is-a" relationship, composition represents a "has-a" relationship.
 
 ## What is Composition?
 
diff --git a/oop/golang/association/README.md b/oop/golang/association/README.md
@@ -2,7 +2,7 @@
 
 ## Introduction
 
-Association is a fundamental concept in object-oriented programming (OOP) that defines a relationship between two or more objects. It represents how objects interact with each other while maintaining their independence.
+Association is a key concept in object-oriented programming (OOP) that defines a relationship between two or more objects. It represents how objects interact with each other while maintaining their independence.
 
 Association is **not inheritance**—rather, it is a relationship between objects that allows communication while ensuring they remain loosely coupled.
 
diff --git a/oop/golang/composition/README.md b/oop/golang/composition/README.md
@@ -2,7 +2,7 @@
 
 ## Introduction
 
-Composition is one of the fundamental principles of object-oriented programming (OOP). It allows objects to be built using other objects, promoting code reuse, flexibility, and better maintainability. Unlike inheritance, which establishes an "is-a" relationship, composition represents a "has-a" relationship.
+Composition is one of the key concepts of object-oriented programming (OOP). It allows objects to be built using other objects, promoting code reuse, flexibility, and better maintainability. Unlike inheritance, which establishes an "is-a" relationship, composition represents a "has-a" relationship.
 
 ## What is Composition?
 
diff --git a/oop/java/association/README.md b/oop/java/association/README.md
@@ -2,7 +2,7 @@
 
 ## Introduction
 
-Association is a fundamental concept in object-oriented programming (OOP) that defines a relationship between two or more objects. It represents how objects interact with each other while maintaining their independence.
+Association is a key concept in object-oriented programming (OOP) that defines a relationship between two or more objects. It represents how objects interact with each other while maintaining their independence.
 
 Association is **not inheritance**—rather, it is a relationship between objects that allows communication while ensuring they remain loosely coupled.
 
diff --git a/oop/java/composition/README.md b/oop/java/composition/README.md
@@ -2,7 +2,7 @@
 
 ## Introduction
 
-Composition is one of the fundamental principles of object-oriented programming (OOP). It allows objects to be built using other objects, promoting code reuse, flexibility, and better maintainability. Unlike inheritance, which establishes an "is-a" relationship, composition represents a "has-a" relationship.
+Composition is one of the key concepts of object-oriented programming (OOP). It allows objects to be built using other objects, promoting code reuse, flexibility, and better maintainability. Unlike inheritance, which establishes an "is-a" relationship, composition represents a "has-a" relationship.
 
 ## What is Composition?
 
diff --git a/oop/python/association/README.md b/oop/python/association/README.md
@@ -2,7 +2,7 @@
 
 ## Introduction
 
-Association is a fundamental concept in object-oriented programming (OOP) that defines a relationship between two or more objects. It represents how objects interact with each other while maintaining their independence.
+Association is a key concept in object-oriented programming (OOP) that defines a relationship between two or more objects. It represents how objects interact with each other while maintaining their independence.
 
 Association is **not inheritance**—rather, it is a relationship between objects that allows communication while ensuring they remain loosely coupled.
 
diff --git a/oop/python/composition/README.md b/oop/python/composition/README.md
@@ -2,7 +2,7 @@
 
 ## Introduction
 
-Composition is one of the fundamental principles of object-oriented programming (OOP). It allows objects to be built using other objects, promoting code reuse, flexibility, and better maintainability. Unlike inheritance, which establishes an "is-a" relationship, composition represents a "has-a" relationship.
+Composition is one of the key concepts of object-oriented programming (OOP). It allows objects to be built using other objects, promoting code reuse, flexibility, and better maintainability. Unlike inheritance, which establishes an "is-a" relationship, composition represents a "has-a" relationship.
 
 ## What is Composition?
 
