You are presented with the question "What not digested is used as energy storage?" and the following answer choices: 
- RNA
 - Urea
 - fat
 - glucose
 - carbohydrates
 - food
 - protein
 - DDT

Now knowing that if food is not immediately used by the body for energy then that food will be stored for future use and body fat is stored energy, choose the best answer.


 

   fat      