Final answer:
The chief benefit of anaerobic exercise is to increase muscle strength, by engaging in high-intensity, short-duration physical activities that build and strengthen muscles. So the correct option is D.
Step-by-step explanation:
The chief benefit of anaerobic exercise is strength. While aerobic exercises like cycling and running are designed to increase cardiovascular health and muscular endurance, anaerobic exercises like weight training and sprinting focus on intense, short bursts of effort to build muscle size and power. Activities such as resistance training, weightlifting, or sports that involve quick, powerful movements are all examples of anaerobic exercises that improve muscular strength. These exercises significantly increase the strength of muscles by exerting them against considerable resistance, such as weights or one's own body weight. The benefits of anaerobic exercise include building and strengthening muscles, increasing bone strength, and enhancing balance and coordination.