Which of the following is NOT a component of skill-related physical fitness?

Skill-related physical fitness primarily encompasses abilities that enhance an individual's performance in sports and physical activities. The key components of skill-related fitness include coordination, power, speed, agility, balance, and reaction time. These elements are directly linked to athletic performance and skills that can be improved through training and practice.

Body composition, on the other hand, refers to the proportion of fat and non-fat mass in an individual's body. It is an important aspect of overall fitness but falls under health-related fitness components rather than skill-related fitness. While having a good body composition can support physical activity and performance, it does not directly measure the skills required for athletic performance.

Thus, the correct answer identifies body composition as the component that does not belong in the category of skill-related physical fitness.