Fact 1: Plants use unsaturated fatty acids to store energy.

Fact 2: Almost all food energy comes originally from sunlight.

Given the two facts above, answer the question "What do plants use unsaturated fatty acids to store?" with the following options: 
- sunlight
 - glucose
 - heat
 - Nutrients
 - hydrocarbons
 - electron
 - water vapor
 - vitamin C


 

 sunlight        