You are presented with the question "What cools the body?" and the following answer choices: 
- evaporation
 - Putting heat on it
 - Movement of an air mass
 - Starting a fire
 - Evaporation of alcohol
 - Evaporation of water
 - vaporization
 - reduced heat

Now knowing that sweat wets the skin, and when it evaporates, it cools the body and fig 4-23 sweat contains water, salt, lactic acid, vit, choose the best answer.


 

      Evaporation of water   