Answer the following question given this paragraph: 

Carbohydrates are biochemical compounds that include sugars, starches, and cellulose. They contain oxygen in addition to carbon and hydrogen. Organisms use carbohydrates mainly for energy.


Q: Sugars, starches, and cellulose are examples of what biochemical compounds that organisms use for energy?

 Choices:

- calories

- prokaryotes

- proteins

- carbohydrates

A:
carbohydrates
