Which phrase best describes body composition?

Body composition refers to the entire makeup of the human body, encompassing different components such as muscle mass, fat mass, water, and bone density. Understanding body composition is essential for assessing overall health, as it provides insight not only into your weight but also into how much of that weight comes from muscle versus fat.

While the percentage of fat in the body and managing body weight are important aspects of health and fitness, they are specific elements of the broader concept. The phrase about substances in equal amounts in the body is not relevant, as body composition does not imply equal distribution of its various components. Instead, it emphasizes the diverse nature of the components that contribute to an individual's physical structure and health status.