Study the images of two different fronts.

Item A: Arrows for a cold front and warm front meet with high level, grey clouds. Item B: Arrows for a cold front and warm front are moving in the same direction. The warm front is above the cold front.

Based on arrow movement, why is the front shown in item A different from the front shown in item B?

Warm air rises above cold air in item A, while two air masses collide in item B.
Cold air mixes with warm air in item A, while two air masses barely move in item B.
Warm air is pushed upward near cold air in item A, while a boundary forms in item B.
Two air masses form a boundary in item A, while warm air rises above cold air in item B.

The front shown in item A differs from that shown in item B because: D. Two air masses form a boundary in item A while warm air rises above cold air in item B.

What is an occluded front?

An occluded front can be defined as a composite weather front that is typically formed during cyclogenesis, which eventually causes a cold front to overtake a warm front and thereby, forcing it aloft with respect to air masses.

This ultimately implies that, an occluded front causes warm air to be mostly separated from a cyclone center that is experienced at the surface of planet Earth.

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