Question 1259Navigation General

The correct answer is C) cold front overtaking a warm front. An occluded front forms when a cold front overtakes a warm front, causing the warm air to be lifted and pushed up over the advancing cold air. This process of the cold front catching up to and lifting the warm front is what leads to the development of an occluded front. The other options are incorrect because: A) a high pressure area does not directly cause an occluded front to form, B) a low pressure area alone is not sufficient to create an occluded front, and D) an area of calm air is not a factor in the formation of an occluded front.