I looked it up-Second Law: The amount of usable energy in the universe is steadily decreasing, while the level of disorganization is steadily increasing. ... in all natural processes some potential energy (organized energy) is always converted to kinetic energy (disorganized energy, usually in the form of heat). So your answer should be usable energy
Photosynthesis converts carbon dioxide and water into oxygen and glucose. Glucose is used as food by the plant and oxygen is a by-product. Cellular respiration converts oxygen and glucose into water and carbon dioxide. Water and carbon dioxide are by- products and ATP is energy that is transformed from the process.
