Final answer:
When the conditions and temperature are right, small droplets in clouds form larger droplets and precipitation occurs.
Step-by-step explanation:
When the conditions and temperature are right, the small droplets of water in clouds form larger droplets and precipitation occurs. Rising air currents carry water vapor into the atmosphere, where it cools and condenses into tiny droplets that may form clouds. If these droplets coalesce and grow large enough, they fall as precipitation in the form of rain, snow, sleet, hail, or freezing rain. This process is part of the water cycle, where water evaporates, condenses, and falls back to the Earth's surface.