Examine the graphic and caption in the section "One Atmosphere, Many Layers."

Which selection from the article is BEST illustrated by the graphic and caption?

A
"Tropos" means change, which makes sense because the troposphere is constantly mixing up the gases in this part of our atmosphere.
B
The stratosphere is where you'll find the very important ozone layer.
C
The ionosphere is where auroras happen.
D
The exosphere is the outermost layer of our atmosphere.