The best explanation of why Rukeyser repeats them is "to emphasize the idea that war is violent".
<h3>What is a poem?</h3>
A poem is a piece of poetic writing, that is with an intensity or depth of expression or inspiration greater than is usual in prose.
Rukeyser repeated the first and last lines of the poem in order to emphasize the idea that war is violent and it destroys. War is never a thing of joy an individual should experience. It displace families, destroy properties and businesses.
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Charlie is a young boy who loves to play with his train wagon and listens to the music the train makes while on the railroad path. His father wants him to be a pilot one day but he prefers now not to even think about what he would like to be. His teacher is a lovely female and loves quiet-silent times at reading time with her pupils. Charlie likes to read the story "A happy Lemon tree" because it teaches him how it grows and when he finishes the story, he goes rapid to the playground to play with his peers.
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Explain everything. Imagine that the person who was asking, knows nothing at all so you need to start from the very beginning.