Asubject with at least two parts joined by and, or, or nor is

collective
compound
singular
plural

summary - a brief statement or account of the main points of something.

main idea - the main idea is defined as the main point of a speech or piece of writing.

paragraph - a distinct section of a piece of writing, usually dealing with a single theme and indicated by a new line, indentation, or numbering.

i think its d

hope i can you