Association vs. Aggregation [duplicate]

Answer 1

There are four kinds of Class relationships

1. Association: uses a
   Ex:a Class Man uses a Class Pen ( Pen is still there when man die )
2. Aggregation: has a
   Ex:a Class Man has a Class Car ( Car is still there when Man die )
3. Composition: owns a
   Ex:a Class Man owns a Class Heart ( When Man die, Heart die )
4. Inheritance: is a
   Ex:a Class Man is a Class Human ( Man is a Human )

A relationship between classes of objects

Inheritance>Composition>Aggregation>Association