Answer the following question given this paragraph: 

An asteroid can only change due to a collision. A collision may cause the asteroid to break up. It may create craters on the asteroid’s surface. An asteroid may strike a planet if it comes near enough to be pulled in by its gravity.


Q: What is the only thing that can change an asteroid?

 Choices:

- weather

- a wind

- a situation

- a collision

A:
a collision
