Great fog areas often occur off Newfoundland because of what atmospheric interaction?

The formation of great fog in areas like Newfoundland is largely due to the interaction of warm and cold air currents. The correct answer highlights that warm air over the Gulf Stream meets the colder inshore currents moving south from Greenland.

This atmospheric interaction is significant because warm air can hold more moisture than cold air. When the warm, moist air from the Gulf Stream encounters the cold air from Greenland, the temperature drops, causing the moisture in the warm air to condense into tiny water droplets that ultimately form fog. This process is quite common in maritime environments where these contrasting temperatures frequently intersect.

The other options might describe similar interactions in different geographical locations but do not accurately represent the specific conditions off Newfoundland, which is characterized by the interaction of the Gulf Stream and the cold currents from Greenland.