In some cases but not all
You use expression by explaining your feeling in writing form. Sadness is one of the most expressed feelings in writing. Here is a site to get you an idea if you want to write a story:
https://www.scoopwhoop.com/saddest-lines-from-literature/#.fs19fnc37
Hope it helps!!!
The answer is the first one
Yes.
The quotation should be followed by the author's name and a page reference in
parentheses.
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