Final answer:
A literary theme is the message a text conveys about a topic.
Step-by-step explanation:
A literary theme is defined as the message a text conveys about a topic. It is the underlying idea or central insight that the author wants to communicate to the reader. Themes can be expressed through various elements like characters, plot, setting, and symbolism. For example, in the book 'To Kill a Mockingbird' by Harper Lee, one of the themes is racial injustice.
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