The following force diagram represents newton’s third law of motion

True

Explanation:

According to the third Newton's law of motion, for every action, there is an equal and opposite reaction which acts with similar momentum and the opposite velocity.  In other words, the action force is equal and opposite to the reaction forceBased on the this law, there are two forces , for example when you sit on a chair, the body exerts a downward force on the chair, and the chair exerts an upward pressure on the body.  The two forces resulting from the interaction are called action and reaction forces. These forces are equal and opposite.

Amethod of procedure that has characterized natural science since the 17th century, consisting in systematic observation, measurement, and experiment, and the formulation, testing, and modification of hypotheses.

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.