કમ્પોઝિશન કેમ વારંવાર ઇનહેરિટન્સ પર પસંદ કરવામાં આવે છે?

INHERITANCE → a class EXTENDS another, inheriting its behavior ("IS-A" relationship):
  class Dog extends Animal
COMPOSITION → a class is BUILT FROM other objects/behaviors ("HAS-A" / uses):
  class Car { constructor() { this.engine = new Engine(); } }   // composes behaviors
→ composition: combine smaller pieces; inheritance: derive from a parent