A: Clouds are named based on their shape and how high or how low they are in the sky.
and
Clouds release water in different forms based on how cold or warm the air is.
B: “Cumulus clouds are middle clouds. These clouds look like giant cotton balls in the sky.” (Paragraph 4)
and
“When the air is colder, the water may form snowflakes instead. Freezing rain, sleet, or even hail can fall from clouds.” (Paragraph 5)