A megalopolis is B. a series of almost continuous metropolitan centers with urban functions that exchange flows of people and goods with the surrounding areas and the rest of the world. An example is the Tokkaido Megalopolis in Japan.
Your answer would be D) Simile.
This is because the clause compares the loneliness to a cloud, and similes are used to compare things, like "The food was as hot as the sun" or "The school was like a zoo".
I hope this helps!
If the question is how are they related, it is a total comparison.
Answer:
From Ignorant to Supportive to Playful to Reluctant
