Question 1267Navigation General

The correct answer is D) warm front. When a warm air mass overtakes and replaces a cold air mass, the contact surface between the two air masses is called a warm front. This is because the warm air mass is moving in and replacing the colder air mass, causing the temperature to rise at the surface. The other options are incorrect because: A) A cold front occurs when a cold air mass replaces a warm air mass. B) A line squall is a narrow band of active weather, such as thunderstorms, that moves across an area. C) An occluded front forms when a warm front overtakes a cold front.