Answer the following question given this paragraph: 

When gas molecules bump into things, it creates pressure. Pressure is greater when gas molecules occupy a smaller space, because greater crowding results in more collisions. This explains why decreasing the volume of a gas increases its pressure.


Q: Decreasing the volume of a gas and keeping everything else the same will cause its pressure to change in what way?

 Choices:

- heat up

- decrease

- lower

- increase

A:
increase
