Answer: The repeated words explain the child's imaginary powers.
Explanation:
I think you were asking for an answer to multiple choice, yes? Repitition often is used to add power or importance to a statement being made. By repeating the certain words of "King" and "Swing" you can get a sense of power that is meant to be created. The author is using it to stress the child-like imagination in the excerpt. Hopefully this answered your question and if not I'm happy to try again.
“The Federalist Papers were written to support the ratification of the Constitution, specifically in New York. Whether they succeeded in this mission is questionable.”
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It is probably murder, because the word is most commonly thought of as being hateful and full of unbridled emotion, and in this particular passage, it is most likely used to convey disgust.