You are presented with the question "What has a positive impact on mans survival?" and the following answer choices: 
- food
 - support
 - heat
 - warmth
 - bamboo
 - warm
 - glycogen
 - hormones

Now knowing that staying warm has a positive impact on an animal 's survival and man is an animal with primary instincts of survival, choose the best answer.


 

    warmth     