Praxis II General Science

Answer: D - Clouds are usually categorized by their height above the ground, precipitation (rain or snow), and their basic shape. Composition and color don’t make sense, since all clouds are made of water and white to gray in color. Fog is a type of low-lying cloud that is produced by a nearby body of water. Thus, fog is not produced by clouds, and this is not a valid method for distinguishing the types of clouds.