Answer:
condensation
Step-by-step explanation:
During a hot shower, the water vapor condenses on the cooler mirror, causing it to fog up. This is an example of condensation, which is the process by which a gas or vapor turns into a liquid when it comes into contact with a cooler surface. The water vapor in the air is at a high temperature, but when it comes into contact with the cooler surface of the mirror, it loses heat energy and transitions back into its liquid state. This phenomenon can also be observed when dew forms on the grass in the early morning or when water droplets form on the outside of a cold drink on a hot day.