Staying warm has a positive impact on an animal 's survival, and with a thick fur coat and 4 inches of fat a bear stays warm. Given these facts, what has a positive impact on an animal's survival among 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     