Answer:
Martin Luther King Jr. effectively hooks his audience in his iconic "I Have a Dream" speech by opening with the powerful phrase, "I am happy to join with you today in what will go down in history as the greatest demonstration for freedom in the history of our nation." This statement immediately captures the audience's attention by invoking a sense of historical significance and unity. It is highly effective as it sets the tone for the speech, resonating with the deep desire for civil rights and equality, making it an enduring and memorable introduction.
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