What is one key characteristic of anaerobic activity?

Anaerobic activity is characterized by short bursts of high-intensity effort that do not rely on oxygen for fuel, which is why option C is the most accurate. This type of activity is typically performed in short durations, where the body uses energy stored in muscles rather than oxygen. Activities like sprinting, heavy weight lifting, and high-intensity interval training exemplify anaerobic exercise, where the emphasis is on maximum effort over brief periods, leading to fatigue due to the depletion of energy sources.

The other options describe characteristics of different types of exercise. For instance, activities requiring high levels of stamina generally pertain to aerobic exercises, which emphasize endurance over extended periods. Utilizing oxygen efficiently is a hallmark of aerobic activities, where the body requires a steady supply of oxygen to sustain longer-duration work. Performing at a steady pace is also characteristic of aerobic activities, such as jogging or cycling, rather than the fluctuating intensity levels seen in anaerobic workouts. Thus, the focus on short bursts of energy clearly distinguishes anaerobic exercise from other forms of physical activity.