You are presented with the question "What is controlled by the carbon circle and is transferred between organisms and atmosphere" and the following answer choices: 
- Energy.
 - Chemical energy
 - Carbon Dioxide
 - Organic compounds
 - flow of electrons
 - heat energy
 - oxidation reaction
 - temperature

Now knowing that carbon cycles quickly between organisms and the atmosphere and carbon dioxide is controlled by the carbon cycle, choose the best answer.


 

   Carbon Dioxide      