Fact 1: If an animal sweats then that animal 's bodily water decreases.

Fact 2: Just like sweating, the evaporation of the water cools the body.

Given the two facts above, answer the question "why do animals sweat?" with the following options: 
- energy
 - cool off
 - evaporation
 - Heat energy
 - reduced heat
 - food
 - reduce
 - heat


 

  cool off       