Fact 1: Staying warm has a positive impact on an animal 's survival.

Fact 2: With a thick fur coat and 4 inches of fat a bear stays warm.

Given the two facts above, answer the question "What has a positive impact on an animal's survival?" with the following options: 
- four limbs
 - sensory neurons
 - low water availability
 - fur and fat
 - loss of food
 - heat energy
 - hormones
 - destruction of habitat


 

    fur and fat     