How does an occluded front form?

Choices

• A warm air mass forms in place with no movement

  A stationary front, not an occluded front, shows little movement.

• ✓ A fast-moving cold front overtakes a warm frontcorrect

  An occlusion occurs when a cold front catches up to and lifts a warm front.

• Two high-pressure systems merge

  Fronts are boundaries between air masses, not merged highs.

• A warm front dissipates over water

  This does not describe how an occluded front forms.