The Diagram number 4 best illustrates how air rising on a mountain produces precipitation.
Precipitation
Precipitation is important for the biodiversity and ecosystem of the planet. It is the process of formation of liquid, frozen or gas form of water in the atmosphere, and falling back on earth. It comes in many forms, like rain, sleet, and snow.
There are three major types of water cycle, Evaporation, Condensation and Precipitation. As far as the question is concerned, the best diagram which illustrates precipitation is number 4.
Learn More about Water Cycle here:
https://brainly.com/question/282587
