Question

the ____ is the bony chamber that protects and supports the brain.
centrum
cranium
cephalum
skull
cortex

Explanation:

The cranium is the bony structure that specifically forms the chamber protecting and supporting the brain. The centrum is part of a vertebra, cephalum is a general term for the head - like part in some organisms, the skull includes both the cranium and facial bones, and the cortex refers to the outer layer of an organ like the brain's cerebral cortex.

Answer:

B. cranium