Answer :
Final answer:
A cold front forms when a cold air mass moves into a warm air mass, leading to cloud formation, precipitation, and potentially strong winds.
Explanation:
A cold front forms when a cold air mass moves into a warm air mass. The cold air mass advances faster than the warm air mass, lifting it and causing water vapor to condense, forming clouds and precipitation. Strong winds may occur along a cold front due to temperature and pressure differences.
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Answer: B. A cold air mass moves into a warm air mass
Explanation:
When a dense cold air mass pushes under a lighter warm air mass it forces the warm air to rise, which causes a cold front. Cold fronts can cause a change in weather and they can move fast almost twice as much as a warm front.