Fact 1: When the body is hot , sweat is produced to cool the body.

Fact 2: Humans use evaporation of water, sweat, to cool their bodies.

Given the two facts above, answer the question "What is used to cool the body?" with the following options: 
- vaporization
 - exercise
 - Animal fur
 - magnetism
 - Solar energy
 - dry and hot
 - sun
 - evaporation


 

        evaporation 