Final answer:
The subject of this question is Biology. It is related to the study of the human body, specifically muscles, bones, and joints. One aspect mentioned is body composition, another aspect is muscle strength, and the last aspect is joint flexibility.
Step-by-step explanation:
The subject of this question is Biology. It is related to the study of the human body, specifically muscles, bones, and joints.
One aspect mentioned in the question is the relative percentage of body fat compared to lean body mass, which falls under the topic of body composition.
Another aspect is the amount of force that can be produced by a single contraction of a muscle, which is referred to as muscle strength.
The last aspect mentioned is the range of movement possible at various joints, which is known as joint flexibility.