What does the cranial cavity enclose?

The cranial cavity specifically encloses the brain, providing it with a protective bony structure formed by the skull. This cavity not only shields the brain from physical damage but also serves as a supportive environment, accommodating the delicate tissues and facilitating connections to other parts of the central nervous system.

The other choices pertain to different body cavities: the lungs are located within the thoracic cavity, the heart is also situated in the thoracic cavity but within a specific space called the mediastinum, and the stomach resides in the abdominal cavity. Each of these cavities serves distinct functions and houses specific organs, further emphasizing the unique role of the cranial cavity in safeguarding the brain.