What is a characteristic of a warm front?

A warm front is characterized by the leading edge of a warm air mass that is replacing a cooler air mass. As this warm air rises over the cooler air, it cools and condenses, which often results in cloud formation and precipitation. The temperature typically increases as the warm front approaches because the warm air moves in and overtakes the cooler air, causing the temperature to drop prior to its arrival due to the movement of the cooler air mass.

In relation to the choices, it is important to note that while a warm front often brings a steady, light precipitation rather than severe thunderstorms, it does lead to a gradual temperature increase as the front passes, alongside the formation of clouds and potential rain as condensation occurs. Therefore, the option that correctly describes the phenomenon associated with a warm front is that temperature drops and condensation occurs prior to the warm air moving in, leading to these weather changes.