Yesss most is an idefinite pronoun
Ok so I am positive the answer is the lesson/moral of the story this is because when searching upon what the theme is; the theme is the message or meaning the work (or story) is trying to communicate (or tell) you. Hope this helps oiiiiiiii!!!!!!!!!
Incomplete, part, abridged, unfinished, condenced, partial, and shortened hope i helped.
I believe the answer is undergraduate is that an option