Answer:
His purpose is to convey a negative tone toward the tractors. They are similar to insects that destroy crops, and just like a plague of insects, the tractors are virtually unstoppable.
Explanation:
He think basically that tractors destroy things and are unstoppable just as insects do with plagues
Well chronological order is like A-Z with events but since this is English I would pick casual transitions.
C is most likely the answer.
Hope this Helped!
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