Answer:
A) Photosynthesis removes carbon from the atmosphere, and cellular respiration releases carbon back into the atmosphere.
Step-by-step explanation:
Photosynthesis produces the glucose that is utilized in cellular respiration to make ATP. The glucose is then converted back into carbon dioxide, which is utilized in photosynthesis. While water is broken down to form oxygen through photosynthesis, in cellular respiration oxygen is blended with hydrogen to form water.