You are presented with the question "What is an important survival trait?" and the following answer choices: 
- food and shelter
 - Endocrine system
 - apathy
 - laziness
 - hormones
 - hibernation
 - vanity
 - health

Now knowing that hibernation is used for conserving energy by some animals and energy conservation is an important survival trait, choose the best answer.


 

      hibernation   