You are presented with the question "What do animals use as a food course?" and the following answer choices: 
- it keeps an organism warm
 - water
 - Generating heat
 - Organic compounds
 - deadwood
 - light energy
 - other living things
 - inorganic

Now knowing that heterotrophs get food by eating other living things and animals are heterotrophs, or other-feeders, choose the best answer.


 

       other living things  