Which of the following is considered a skill-related physical fitness component?

Agility is indeed considered a skill-related physical fitness component. Skill-related fitness encompasses abilities that are essential for performing well in sports and physical activities, including agility, coordination, balance, speed, power, and reaction time. Agility specifically refers to the ability to move quickly and change direction with ease, which is critical in many sports and activities where rapid movements and spatial awareness are required.

In contrast, the other options focus on health-related fitness components. Body composition refers to the ratio of fat to lean mass in the body, muscular endurance relates to the ability of a muscle or group of muscles to perform repeated actions over time, and flexibility involves the range of motion in a joint or group of joints. While these attributes significantly contribute to overall health and physical performance, they do not directly reflect the skill-based components vital for athletic performance.