Which of the following best describes a key aspect of physical readiness for diving?

Good overall health and fitness is a fundamental aspect of physical readiness for diving. Divers are subjected to various physiological stresses during dives, including changes in pressure, temperature, and physical exertion. Being in good health and maintaining physical fitness can positively impact a diver's ability to manage these stresses effectively, enhancing overall safety and performance underwater. For example, a well-conditioned body can better tolerate fatigue, improve buoyancy control, and facilitate easier movement in the water.

While strong swimming skills are valuable, they are just one component of a diver's overall fitness and health profile. The ability to manage dive equipment is also important; however, it does not directly reflect one's physical readiness. Knowledge of dive signals is essential for communication underwater but is more related to safety and teamwork than to physical readiness itself. Therefore, good overall health and fitness encompass multiple aspects critical for successful and safe diving.