You are presented with the question "What derive energy from the breakdown of organic molecules?" and the following answer choices: 
- Most plants
 - hydrocarbons
 - potatoes
 - all stones
 - all water sources
 - all mountains
 - all animals
 - Generating heat

Now knowing that all animals are heterotrophs and heterotrophic bacteria derive energy from the breakdown of organic molecules, choose the best answer.


 

       all animals  