Which is listed as a function of the spine?

• A. Provide structural support to allow upright posture
• B. Produce red blood cells
• C. Filter toxins from the blood
• D. Store minerals in bone marrow

Answer: (A)

The spine’s main function is to provide structural support to maintain an upright posture and to protect the spinal cord, forming the central axis of the skeleton and allowing for movement and stability.

That’s why the option describing structural support for upright posture is the best match. The other roles listed are handled elsewhere in the body: red blood cells are produced in bone marrow throughout the skeleton, not specifically by the spine; filtering toxins is a job of the liver and kidneys; and minerals are stored in the bone matrix rather than in bone marrow.