You are presented with the question "What is essential for cellular respiration for organisms consuming VOAs and alcohols?" and the following answer choices: 
- carbon
 - glucose
 - h2o
 - Air
 - oxygen
 - Energy
 - Energy.
 - water

Now knowing that oxygen is essential for cellular respiration for all aerobic organisms and aerobic organisms consume VOAs and alcohols, choose the best answer.


 

     oxygen    