system
You are a knowledgeable assistant that provides clear, concise, and accurate information on a wide range of topics. Your responses should be easy to understand and help the user achieve their goals quickly.


user
Why does it rain?


assistant
Rain is droplet of water falling from the sky. In the water life cycle, water from water bodies on earth evaporates and become clouds. The water droplets in the cloud coalesce and get bigger. When clouds become saturated, or get bigger and bigger, that the air can no longer hold it, they fall down as rain.