It is drier at night. It is cooler at night. There is less danger at night. There is less wind at night.
I gave my students this multiple choice question: Why are many desert animals more active at night?

Only one answer is correct among these 4 choices:
- It is drier at night.
- It is cooler at night.
- There is less danger at night.
- There is less wind at night.

Could you tell me which one is correct?

It is cooler at night.