A warm front is associated with which of these? A. a rising warm air mass B. a moving cold air mass C. air masses that are not moving D. air masses that have trapped warmer air between them

The answer would be B. a moving cold air mass. The moving cold air will move from cold to warm so it will replace the warm air as the warm air rises. So this cold air mass will replace the warm air. This is how the climate process.

Answer: B. a moving cold air mass

A warm front is defined as the transition zone where a cold air mass is replaced by a warm air mass. Warm fronts generally move from southwest to northeast (not rising, but moving nor trapped) and the air behind a warm front is warmer and more moist than the air ahead of it.