What role does the muscular system serve in relation to the skeletal system?

The muscular system plays a crucial role in facilitating movement in coordination with the skeletal system. When muscles contract, they pull on bones, which act as levers to produce motion. This interaction allows for a wide range of physical activities, from basic movements like walking and running to complex actions like playing sports. The muscular system also helps maintain posture and stabilize joints, further contributing to movement efficiency and control.

While the other options address important functions in the body, they do not accurately represent the direct relationship between the muscular and skeletal systems. For instance, the storage of minerals is primarily a function of the skeletal system itself, particularly bones. Similarly, hormone production is mainly associated with the endocrine system, and organ protection is largely a role served by the skeletal system, particularly the ribcage and skull. Thus, the correct answer identifies the primary function of the muscular system in its interaction with the skeletal system: facilitating movement.