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

Fact 2: Sweat is made of salt and water.

Given the two facts above, answer the question "What wets the skin, and when it evaporates, cools the body?" with the following options: 
- acetic acid
 - salt and water
 - Chlorophyll
 - peachleaf willow
 - reducing acid rain
 - Heat energy
 - heat or cold
 - hydration


 

  salt and water       