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Answer: The lines in this excerpt from Beowulf depict Heorot's qualities of elegance. ... Therefore, Heorot was extravagant and elegant.
Explanation:
I would choose "surgery" here. The word "surgery" implies that the tractor is cutting the earth mechanically or inorganically. Surgery, in the most common sense, is a medical procedure which cuts open and probes one's body to correct a medical issue. If we apply this word to the "earth" it becomes somewhat nefarious. In short, "surgery" is an unnatural term here which implies the tractors displacement atop the earth.
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