What is the difference between composition and aggregation? [duplicate]

Question

What is the difference between composition and aggregation? can anybody give me a sample of this OOAD?

Answer 1

Consider a student, the student's brain, and the school the student attends.

The brain is a part of the student. If the student is destroyed, so is the brain. This is composition.

The student has a school. The student survives the school's destruction, and vice versa. This is aggregation.