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