The most accurate comparison of photosynthesis and cellular respiration from the options provided is:
The products of photosynthesis are the reactants of cellular respiration and vice versa. The reactions are complimentary.
This statement accurately reflects the relationship between the two processes: photosynthesis converts carbon dioxide and water into glucose and oxygen, while cellular respiration uses glucose and oxygen to produce carbon dioxide and water, making them complementary processes in the energy cycle of ecosystems.