Fact 1: Glucose is used for energy by the cells of most organisms.

Fact 2: Food is converted into glucose.

Given the two facts above, answer the question "Food is used for energy by what part of most organisms?" with the following options: 
- trees
 - Gasoline
 - plants
 - insects
 - Cells
 - Oxygen
 - Water
 - animals


 

     Cells    