Fact 1: Sweat wets the skin, and when it evaporates, it cools the body.

Fact 2: Sweat is released from sweat glands beneath the skin, and as it evaporates, the skin is cooled.

Given the two facts above, answer the question "What cools the skin?" with the following options: 
- humidity
 - temperature
 - condensation
 - Solar energy
 - evaporation
 - vaporization
 - layers of fat
 - water vapor


 

     evaporation    