You are presented with the question "That the cellular level, the final stage of breathing oxygen is" and the following answer choices: 
- keeps the organism warm
 - rapid expansion
 - permineralization
 - Plant growth is reduced
 - major threat to health
 - electron transport
 - more abundant
 - flow of electrons

Now knowing that electron transport is the final stage of aerobic respiration and breathing gets oxygen into the body, but aerobic respiration occurs at the cellular level, choose the best answer.


 

      electron transport   