Which cavity contains the brain?

The brain is located in the cranial cavity, which is a specific part of the dorsal cavity. The cranial cavity is encased by the skull and provides a protective environment for the brain. This cavity contains not only the brain itself but also surrounding membranes and cerebrospinal fluid, which help cushion and support the brain.

While the dorsal cavity includes both the cranial cavity and the spinal cavity, the cranial cavity specifically refers to the space that houses the brain. The thoracic cavity, on the other hand, is located in the chest area and contains organs such as the heart and lungs, while the spinal cavity runs along the vertebral column and contains the spinal cord. Thus, the definition and location of the cranial cavity make it the correct answer to this question.