Typically, the use of imagery, in this case, a mountain, creates a picture in the reader's mind of the setting to make it feel more realistic.
Hope I could help!
Think of it this way a prepostition is anything a bunny can do to a stump.
Basically. You have to write an essay on how far you agree with the statement. So write two agree paragraphs and two disagree paragraphs then a conclusion. For agree find quotes or points in the text that mean you agree and then for disagree find quotes or points that mean you disagree. Then decide overall if you agree or disagree.