Which is a main function of the skeletal system?

The skeletal system plays a crucial role in providing both support and protection for vital organs within the body. Bones create a structured framework that maintains the shape of the body and facilitates movement in conjunction with muscles. Additionally, the skeletal system acts as a protective casing for delicate organs, such as the brain, heart, and lungs. For instance, the skull safeguards the brain, while the ribcage encases the heart and lungs, ensuring that these essential organs are shielded from injury.

The other options relate to functions that are primarily associated with other systems in the body. The production of hormones is typically the responsibility of the endocrine system, while the transportation of nutrients falls under the purview of the circulatory system. Digestion and absorption of food involve the gastrointestinal system. Thus, the primary functions of the skeletal system distinctly focus on structural support and organ protection.