Final answer:
Fog is both cooling and moisture advection. Cooling occurs when water vapor in the air is cooled enough to form liquid water droplets, resulting in condensation and the formation of fog. Moisture advection happens when warm, moist air moves over a cold surface and the water vapor in the air condenses into fog.
Step-by-step explanation:
Fog is both cooling and moisture advection. When water vapor in the air is cooled enough to form liquid water droplets, it condenses and forms fog. This cooling effect is a result of the energy transferred from the warm air to the cooler surfaces, such as the ground or objects in the environment, causing the water vapor to condense into fog. Additionally, fog can also be formed through moisture advection, which occurs when warm, moist air moves over a cold surface and the water vapor in the air condenses into fog.