Why are there very few organisms toward the top of the pyramid? a. there is much less energy available at the top of the pyramid. b. there is too much energy available at the top of the pyramid. c. organisms at the top of the pyramid are preyed upon by many other organisms. d. organisms at the top of the pyramid can only generate energy directly from the sun.

The answer is water molecules are split.cellular respiration and photosynthesis are complement  reactions to each other. these are reverse reactions. in cellular respiration glucose and oxygen yield water and carbon dioxide. so, when respiration begins,  glucose molecules are split. in the opposite reaction - in photosynthesis, carbon dioxide and water yield glucose and oxygen. thus,  when respiration begins, water molecules are split.

The anwser is: wave a has a greater pitch and frequency.