Which of the following principles of stability is best exemplified when a gymnast squats to regain balance on a balance beam?

When a gymnast squats to regain balance on a balance beam, the principle best exemplified is that a lower center of gravity affords better stability. By squatting, the gymnast lowers their center of gravity, which enhances their stability and balance. A lower center of gravity helps to keep the athlete grounded, making it less likely for them to tip over or lose their balance since the center of gravity is closer to the base of support, in this case, the feet on the balance beam.

Maintaining a lower center of gravity allows the gymnast to have greater control over their movements, making quick adjustments easier while still on the narrow surface of the beam. This principle is fundamental in various sports and activities where balance is crucial, as it can effectively reduce the risk of falling or wobbling.

In contrast, while a wider base of support can also enhance stability, it is not as applicable on a balance beam where the space is limited. The concepts of an elevated center of gravity and increased muscle tension also do not provide the same effective means of improving stability as lowering the center of gravity does in this scenario.