Warm air rises because it A. lacks density. B. has a higher density than cool air. C. has a lower density than cool air. D. is unaffected by pressure.

warm front forms when a moist, warm air mass slides up and over a cold air mass. as the warm air mass rises, it condenses into a broad area of clouds. a warm front brings gentle rain or light snow, followed by warmer, milder weather.

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