The use of repetition by Ginsberg was to reinforce the idea that; A: the world is in need of a good cleaning,
This idea that the world needs a good cleansing furthers the theme of the poem. This is simply the list of the ways that the Earth has been polluted and damaged.
Now, the other options are wrong because there is no sense of perseverance or overcoming of obstacles in the poem. Furthermore, we also don't see him saying anything about appreciating nature, since he doesn't actually show why these places are worth cleaning.
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