Which weather condition commonly occurs along a cold front

Precipitation is your answer. according to my science textbook, in a cold front, warm air and cold air interact and cause precipitation.

Cold fronts form when a cooler air mass moves into an area of warmer air in the wake of a developing extratropical cyclone. 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.

The rocks expand when there hot/warm  and contract when they are cold.

Simple, don't do it. just don't go to that dock