The word best describes the tone of the imagery used in these lines is Option C i.e. Upsetting.
What is context of the poem Forgetfulness?
In Forgetfulness, by Billy Collins, the conceivable topic of the sonnet is resigning, gathering a pack, and drifting down a waterway are like losing one's memory.
To start with, Collins composes that we initially fail to remember the creator of a novel and afterward we totally forget of its presence by any stretch of the imagination.
Lost recollections are contrasted with somebody resigning to a fishing place without telephones, so we can't contact them. There is an exemplification when he composes that the memory of the quadratic condition gather its pack.
He then, at that point, expounds on drifting down the Lehte waterway, it is a Greek legendary stream and assuming you drifted down its waters you failed to remember what you knew.
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