Which letter (A, B, or C) shows where you should apply the most effort to lift the stone?

Protons have a positive charge and, collectively, give an element its atomic number.

The correct choice is c

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.