Fact 1: Evaporation of sweat uses energy, and the energy comes from body heat.

Fact 2: Heat When exercising, the body creates excess heat.

Given the two facts above, answer the question "Evaporation of sweat uses energy, where does the energy come from?" with the following options: 
- vapors
 - temperature
 - expelled
 - environment
 - hydration
 - water vapor
 - The Sun
 - exercise


 

        exercise 