Energy conversion from potential energy (the energy of position or composition) to kinetic energy (the energy of motion) is illustrated by the diagram of a roller coaster.

The answer is a i think

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.