Final answer:
The statement describes Newton's Third Law of Motion, which is about the equal and opposite reactions observed when a force is applied.
Step-by-step explanation:
The statement 'The higher the jump, the "harder" the landing' reflects Newton's Third Law of Motion, which is often phrased as the law of action/reaction. According to this law, for every action, there is an equal and opposite reaction. When someone jumps from a higher point, the impact upon landing is greater due to the increased potential energy that is converted to kinetic energy during the fall. Upon contacting the surface, the legs apply a force to the ground, and the ground applies an equal and opposite force to the legs, resulting in what we perceive as a "harder" landing.