You are presented with the question "What is part of the life process?" and the following answer choices: 
- firefighters
 - Chemical energy
 - bacteria
 - First responders
 - police
 - Organic compounds
 - Excretory system
 - oxidation reaction

Now knowing that organs of excretion make up the excretory system and excretion is a life process, choose the best answer.


 

       Excretory system  