Final answer:
An effective introduction in an expository essay includes a clear thesis statement, engages the reader, and maintains focus throughout the introduction.
Explanation:
An effective introduction to an expository essay should include a thesis statement that is clear, contestable, focused, complex, compelling, and directly connected to the prompt.
Another characteristic is engagement with the reader through a broad opening, establishing context, and providing a route map for the essay's contents.
Lastly, the introduction should quickly capture the reader's interest, exhibit a logical order, clear transitions, strong topic sentences, and stay on the topic while leading to broader implications in the conclusion.
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