Question

read the passage. did you know that rain and sleet both start out as snow? up in the cold clouds, water vapor freezes into ice crystals. these crystals clump together until they get heavy enough to start falling as snowflakes. sometimes, the snowflakes hit a layer of warm air underneath the clouds, so they melt into raindrops. if the air is warm all the way to the ground, those raindrops stay liquid. but if the raindrops hit another layer of cold air beneath the warm one, they refreeze. however, they dont refreeze into snowflakes. instead, they freeze into sleet, which consists of little pellets of ice. how does the author structure this text? by discussing the order of events that lead to rain refreezing on the ground by contrasting the different ways that snowflakes can form by explaining the natural processes that cause rain and sleet to form by introducing the problem of having another layer of warm air beneath a cold one

Explanation:

The passage starts by stating rain and sleet start as snow, then details the processes of how snow - to - rain and rain - to - sleet transitions occur. It's about the natural processes of rain and sleet formation.

Answer:

by explaining the natural processes that cause rain and sleet to form