Fact 1: Electron transport is the final stage of aerobic respiration.

Fact 2: Breathing gets oxygen into the body, but aerobic respiration occurs at the cellular level.

Given the two facts above, answer the question "That the cellular level, the final stage of breathing oxygen is" with the following options: 
- keeps the organism warm
 - rapid expansion
 - permineralization
 - Plant growth is reduced
 - major threat to health
 - electron transport
 - more abundant
 - flow of electrons


 

      electron transport   