It showed how refined his characters were. It tended to show a more eloquent way of speaking. The way iambic pentameter works is a combination of 5 stressed and 5 unstressed syllables its almost chant like which shows the witch sisters almost hypnotic way of speaking. It allows us to know they are witches.
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Adventures of Huckleberry Finn and The Prince & the Pauper
Answer:
4. she explained dear brother not to tease her.
