Which of the following lists all five roles of the skeletal system?

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The skeletal system has five main roles: protecting vital organs, enabling movement by acting as levers with muscles, producing red blood cells, providing structural support for the body, and storing minerals such as calcium and phosphorus. The option that lists protection, movement, RBC production, support, and mineral storage captures all these distinct functions, making it the best choice.

The other options mix in duties from other body systems or describe functions not primarily handled by bones. For example, digestion, immune response, energy storage, and hormone synthesis are linked to the digestive, immune, adipose, and endocrine systems, not to the skeleton. Hearing is a specific function of the tiny bones in the ear, not a general skeletal role, and respiration, circulation, and sensing are core activities of the respiratory, circulatory, and nervous/sensory systems.