What are the main. forces acting on the fishing line represented by two arrow above A friction and compression
B compression and gravity
C tension and friction
D gravity and tension​

The third hammer 8 pounds

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.