Fact 1: Hibernation is used for conserving energy by some animals.

Fact 2: Squirrels are the best animals since cats.

Given the two facts above, answer the question "What can squirrels do to conserve energy?" with the following options: 
- sleep
 - hibernate
 - adding heat
 - swim
 - run
 - survive
 - burrow
 - Change colors


 

  hibernate       