I would go with 6 because if there would to be an emergency there would be enough water there.
I’m pretty sure it’s B, sorry if I’m wrong though, it’s been a while since I’ve learned this! ☻
Answer:
thoracic cavity
Explanation:
The thoracic cavity is separated from the abdominopelvic cavity by the diaphragm. The thoracic cavity is further separated into the pleural cavity which contains the lungs and the superior mediastinum which includes the pericardial (heart) cavity.
