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

Fact 2: Evaporation is when a liquid turns into a gas.

Given the two facts above, answer the question "Sweat cools the body when it" with the following options: 
- Movement of an air mass
 - dry conditions
 - heat produced
 - Decreased precipitation
 - hydration
 - It expands
 - the environment
 - turns into a gas


 

        turns into a gas 