The diagrams show the horizontal forces acting on the cyclist at three different speeds. The length of an arrow represents the size of the force.
A
B
с
Which one of the diagrams, A, B or C, represents the forces acting when the
cyclist is travelling at a constant 9 m/s?
С
Explain the reason for your choice.

Ibelieve the answer is b

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.

Ithink the answer is d