Options:
I. Energy.;
II. Chemical energy;
III. Carbon Dioxide;
IV. Organic compounds;
V. flow of electrons;
VI. heat energy;
VII. oxidation reaction;
VIII. temperature;
Q: 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, what is controlled by the carbon circle and is transferred between organisms and atmosphere?
A:
III.