To use proper word choice in order to get your point across properly and not seem unprofessional or offensive
A verb is the action that the subject does.
The verb in this sentence is was.
Night (the subject or noun) is doing the action of "being" quiet (the adjective since it describes the night)
Hope this helped!
~Just a girl in love with Shawn Mendes
The main Idea and supporting details.
D. A complement
You could associate the "comple" in complement to "comple" in complete to help you remember.