Gasoline and propane fumes are most likely to accumulate in which part of the boat?

Gasoline and propane fumes are most likely to accumulate in the lower parts of the boat, particularly in the bilge area. This is because these gases are denser than air and tend to settle in confined spaces. Additionally, any leaks or spills can lead to the buildup of fumes in these areas, creating a potential safety hazard. It's important to ensure proper ventilation and regularly check for leaks in these locations.