You are presented with the question "What do plants use unsaturated fatty acids to store?" and the following answer choices: 
- sunlight
 - glucose
 - heat
 - Nutrients
 - hydrocarbons
 - electron
 - water vapor
 - vitamin C

Now knowing that plants use unsaturated fatty acids to store energy and almost all food energy comes originally from sunlight, choose the best answer.


 

 sunlight        