Fact 1: Cells are the basic units of the structure and function of living things.

Fact 2: All cells use glucose for energy.

Given the two facts above, answer the question "What do all living things use for energy?" with the following options: 
- fish
 - kids
 - energy
 - glucose
 - The Sun
 - procreation
 - sunlight
 - food


 

    glucose     