Which component of the earth’s atmosphere is decreased due to photosynthesis?. A.ozone. B.oxygen. C.hydrogen peroxide. D.carbon dioxide

D.carbon dioxide Carbon dioxide is used up during Photosynthesis.

The answer to this question is letter "D. carbon dioxide". Carbon dioxide is a compound that plays an essential role in photosynthesis. During the process, the plants take it in together with water to produce sugar and other important compounds.