Fact 1: Carbon cycles quickly between organisms and the atmosphere.

Fact 2: Carbon dioxide is controlled by the carbon cycle.

Given the two facts above, answer the question "What is controlled by the carbon circle and is transferred between organisms and atmosphere" with the following options: 
- Energy.
 - Chemical energy
 - Carbon Dioxide
 - Organic compounds
 - flow of electrons
 - heat energy
 - oxidation reaction
 - temperature


 

   Carbon Dioxide      