How does photosynthesis affect the flow of energy in the biosphere? . A. Photosynthesis is the base of energy flow, because it converts energy from the sun into fuel for plants and animals.. B. Photosynthesis is the end result of energy flow, because it consumes organic molecules produced by cellular respiration.. C. Photosynthesis cycles the flow of energy as it produces organic molecules.. D. Photosynthesis depletes the flow of energy as it converts inorganic molecules to organic molecules..