Available choices: * summer end; * evaporation; * Winter; * movement; * air cools; * Wet weather; * rainy; * dry and hot;
Given those answer options, answer the question: Fact 1: Fog is formed by water vapor condensing in the air. Fact 2: When air cools, the water vapor in the air condenses.". Given the two facts above, fog is formed when?
A:
air cools