What does body composition assess in relation to human bodies?

Body composition assessment evaluates the different components that make up a person's body, including the percentages of fat, bone, and muscle. This comprehensive approach provides insights into an individual's overall health and fitness levels. By analyzing these components, body composition assessments can help determine whether someone is at a healthy weight, the effectiveness of a training program, or the potential risks for certain health conditions.

Focusing on just one component, such as muscle mass or fat distribution alone, does not provide a complete picture of an individual's health. Similarly, while the total water content of the body is important for various physiological functions, it does not encompass the broader framework of body composition assessment that includes muscle, fat, and bone percentages. Hence, the correct option encapsulates the multifaceted nature of body composition, which is vital for understanding physical fitness and health.