Photosynthesis removes CO2 from the atmosphere and replaces it with oxygen.
Explanation:
Photosynthesis removes CO2 from the atmosphere and replaces it with oxygen. By respiration, O2 is removed from the atmosphere and replaced with CO2. However, these processes are not balanced. Some organic matter is not oxidized. (I'm very sorry if I'm wrong but I believe it's that)
The process that takes CO2 out of the atmosphere is Photosynthesis because photosynthesis removes all the CO2 from out the atmosphere and it is replacing the CO2 with O2. When we breathe we take O2 from the atmosphere and replaces it with CO2.
