You are presented with the question "Furry animals grow thicker coats which has what impact on their survival?" and the following answer choices: 
- heat
 - positive
 - negative
 - energy
 - ironic
 - Energy.
 - decreased
 - adding heat

Now knowing that staying warm has a positive impact on an animal 's survival and furry animals grow thicker coats to keep warm in the winter, choose the best answer.


 

  positive       