Answer:
Cold fronts form when a cooler air mass moves into an area of warmer air in the wake of a developing extratropical cyclone.
Explanation:
The warmer air interacts with the cooler air mass along the boundary, and usually produces precipitation. Cold fronts often follow a warm front or squall line.
A, unless D is a better choice, because i cant see what D is
for the bottom question
Answer:
I would happily help out if the diagram is shown