Which characteristic is common to maritime tropical air masses?

Maritime tropical air masses are characterized by being warm and humid. This type of air mass typically forms over warm ocean waters in tropical regions. The key elements of this environment are the warmth of the air and the moisture content that it gathers from the ocean surface.

As the air moves over the warm waters, it picks up significant amounts of moisture, leading to high humidity levels. This is crucial because it influences weather patterns, often resulting in the formation of clouds and precipitation as this warm, moist air interacts with cooler air masses or rises in elevation.

The other characteristics mentioned, such as cold and dry, cool and dry, or hot and dry, do not align with the typical traits of maritime tropical air masses, as they lack the warmth and humidity that define this class of air. Maritime tropical air is specifically associated with conditions that produce warm temperatures combined with the moisture necessary for various weather phenomena.