Answer:
D. The central message or insight revealed through a story or poem
Explanation:
Every work of literature has one or more themes. The theme is a universal idea, a message you can identify (although often not explicitly, but with the help of a symbol or a motif) while reading a story or a poem. Themes are universal; they do not apply to just one character or event, but can be applied to our lives as well. That's why many works can explore the same theme.
