You are presented with the question "What cools the skin?" and the following answer choices: 
- humidity
 - temperature
 - condensation
 - Solar energy
 - evaporation
 - vaporization
 - layers of fat
 - water vapor

Now knowing that sweat wets the skin, and when it evaporates, it cools the body and sweat is released from sweat glands beneath the skin, and as it evaporates, the skin is cooled, choose the best answer.


 

     evaporation    