Final answer:
A literary theme is the main idea or message of a literary work, expressed through symbols, characters, plot, and dialogue. It explores underlying topics and can provide insights about human nature and society.
Step-by-step explanation:
A literary theme is the main idea or message of a literary work. It is the underlying topic or central idea that the author explores throughout the story. Themes can be expressed through symbols, characters, plot, and dialogue, and they often reveal insights about human nature, society, or morality. For example, in William Shakespeare's play Romeo and Juliet, one of the main themes is love and its consequences. This theme is conveyed through the actions and emotions of the characters and the tragic outcome of their forbidden love.
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