What type of air mass forms over warm tropical waters?

The correct answer is maritime tropical. This type of air mass originates over warm tropical waters, which means it is characterized by warm, moist air. The term "maritime" indicates that the air mass has developed over oceanic areas, while "tropical" refers to the warm temperatures typically associated with the tropics. When this warm, moist air moves over land, it can lead to increased humidity and the potential for precipitation, influencing local weather patterns.

In contrast, the other types of air masses are defined by their different origins and characteristics. Continental polar air masses, for example, form over cold land areas and consist of cold, dry air. Similarly, continental tropical air masses are hot and dry, developing over warm land regions, while maritime polar air masses arise over cool ocean waters and consist of cold, moist air. Each type has distinct effects on weather, but maritime tropical is specifically associated with warm, moist conditions characteristic of tropical ocean areas.