Final answer:
A theme in literature is an idea about a major topic that is explored throughout a text through various elements such as characters, events, and symbols.
Step-by-step explanation:
A theme in literature refers to a central idea or message that is explored throughout a text. It is an idea about a major topic, rather than the topic itself. Themes are usually expressed through various elements such as characters, events, and symbols. For example, in the novel 'To Kill a Mockingbird', one of the themes is the nature of prejudice, which is explored through the experiences of the characters and the events in the story.
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