What happens when an occluded front forms?

When an occluded front forms, a warm front is indeed lifted above a cold front. This atmospheric phenomenon occurs typically when a cold front overtakes a warm front, causing the warm air mass to rise as the denser cold air pushes underneath it. As a result, the warm air is forced aloft, which can lead to cloud formation and precipitation.

This vertical movement of warm air can contribute to the development of complex weather systems. The occluded front signifies a transition area where different air masses meet, and it often indicates a stage of cyclone development where the warm sector of a low-pressure system is cut off or "occluded" from the surface.

In contrast, other options represent different weather phenomena that do not accurately describe the dynamics of an occluded front. A cold front moving away from a warm front is more indicative of a separation of air masses rather than their interaction. The stabilization of a warm front in place suggests a lack of dynamics that would lead to the formation of an occluded front. Lastly, while stationary fronts involve two air masses in contact without significant movement, an occluded front specifically involves one air mass being lifted over another, creating distinct weather effects associated with it.