Which body cavity contains the lungs?

The thoracic cavity is the correct choice because it encompasses the space within the chest that houses vital organs, specifically the lungs, heart, and major blood vessels. This cavity is protected by the rib cage and is bounded by the diaphragm below. The lungs are situated on either side of the heart and are crucial for respiration, allowing for the exchange of oxygen and carbon dioxide in the body.

In contrast, the cranial cavity is primarily responsible for housing the brain, while the spinal cavity is associated with the spinal cord. The abdominal cavity contains digestive organs and is located below the thoracic cavity, making it separate from where the lungs are located. Therefore, the thoracic cavity is distinctly characterized by its role in housing the lungs and facilitating respiratory functions.