Which of the following is a function of bones?

Bones play several vital roles in the body, making option C particularly significant. One of the primary functions of bones is to provide structural support to the body, enabling us to maintain our shape and posture. This support is crucial not only for physical stability but also for protecting the vital organs; for instance, the rib cage protects the heart and lungs.

Additionally, bones serve as a site for hematopoiesis, the process of blood cell production. This occurs mainly in the bone marrow, where red blood cells, white blood cells, and platelets are generated. Thus, bones are not only passive structures but also active components in the production of blood cells that are essential for oxygen transport, immune function, and clotting.

The other options, such as storing glucose, producing bile, and secreting hormones, do not accurately represent the functions of bones. Glucose storage primarily occurs in the liver and muscles, bile production is the function of the liver, and hormone secretion is typically associated with glands such as the pancreas or thyroid. Thus, the chosen answer accurately encapsulates the fundamental roles of bones within the body.