You are presented with the question "What cycle quickly between organisms and the atmosphere?" and the following answer choices: 
- chlorofluorocarbons
 - organic molecules
 - Most plants
 - Greenhouse gasses
 - Greenhouse gases
 - emissions
 - fossil fuels
 - Burning fuel and air

Now knowing that carbon cycles quickly between organisms and the atmosphere and an organic molecule is one involving carbon, choose the best answer.


 

  organic molecules       