There is no life in any of its parts. It stops breathing. Its temperature is higher than when it is active. It is absorbing energy for use when it is active. It is using less energy than when it is active.
I gave my students this multiple choice question: What happens when an animal hibernates?

Only one answer is correct among these 4 choices:
- There is no life in any of its parts.
- It stops breathing.
- Its temperature is higher than when it is active.
- It is absorbing energy for use when it is active.
- It is using less energy than when it is active.

Could you tell me which one is correct?

It is using less energy than when it is active.