Fact 1: Organisms use lipids to store energy.

Fact 2: FATS, or lipids, are vital nutrients.

Given the two facts above, answer the question "What is used by organisms to store energy?" with the following options: 
- Carbon
 - feces
 - sugar
 - food
 - Energy
 - fats
 - trees
 - brains


 

      fats   