How is an occluded front different from a cold front

A warm air occlusion or occluded front is less common than a cold occlusion. A warm occlusion occurs as cool air moves rapidly into an area with an existing warm front. The difference from a cold occlusion is that the approaching cool air is not as cold as the retreating cold air in the existing front.

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the correct answer would be true friction causes the faults to slip or collide