You are presented with the question "What requires food?" and the following answer choices: 
- Evaporation of sweat
 - hydration of their cells
 - Most plants
 - Microscopic organisms
 - agriculture
 - to stay alive
 - female sex cells
 - plant life

Now knowing that evaporation of sweat uses energy, and the energy comes from body heat and because food contains energy, choose the best answer.


 

 Evaporation of sweat        