I think it means that the author is lonely, and is comparing himself/herself wandering to a cloud wandering over valleys(I think that's what vales is) and hills.
I'm not so sure, sorry. Hope this helps!
Answer:
(1)At higher altitudes, there is less air pushing down from above.
(2)At higher altitudes, the gravity is weaker further from Earth's center.
Then, the particles can move further apart and spread out more.
Rhetoric is a persuasive form of language.
Answer: New towns spring up in the West. People and supplies pour in. Gold and silver pour out on the railroads. Rapid population growth from re-settlement of workers and immigration bring political changes to the West.
Explanation: