Final answer:
Clouds form through the process of condensation, where water vapor cools and changes into tiny droplets of liquid water that can form clouds.
Step-by-step explanation:
The process in which clouds form is condensation. Condensation is the process of going from gas to liquid. When water vapor rises in the atmosphere and cools, it condenses into tiny droplets of liquid water, which can form clouds. If the droplets get big enough, they fall as precipitation.