Which bone structure protects the brain and houses the sense organs?

• A. Cranium (skull)
• B. Mandible
• C. Vertebrae
• D. Pelvis

Answer: (A)

The main idea is recognizing which bone structure forms a protective case for the brain and also houses the sense organs. The cranium, or skull, provides that protective enclosure around the brain and includes the areas that cradle the sense organs—the eyes in the eye sockets, the ears in the surrounding temporal bones, and the nasal region for smell. The skull’s thick bones shield the brain from injury while its openings and cavities accommodate the sensory structures. In contrast, the mandible is the jaw used for chewing, the vertebrae protect the spinal cord (not the brain), and the pelvis supports the body's lower organs and structure. So the skull best fits the description of protecting the brain and housing the sense organs.