How are photosynthesis and cellular respiration related? O A. Cellular respiration is the process animals use to produce glucose, while photosynthesis is the process plants use to produce glucose. O B. Cellular respiration breaks down glucose, while photosynthesis produces glucose. O C. Photosynthesis releases energy, while cellular respiration stores energy. O D. Photosynthesis produces water molecules, while cellular respiration splits water molecules apart.​

Photosynthesis makes the glucose that is used in cellular respiration to make ATP. ... While photosynthesis requires carbon dioxide and releases oxygen, cellular respiration requires oxygen and releases carbon dioxide. It is the released oxygen that is used by us and most other organisms for cellular respiration.

Explanation:

Photosynthesis makes the glucose that is used in cellular respiration to make ATP. The glucose is then turned back into carbon dioxide, which is used in photosynthesis. While water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.

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i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.