The line contains an example of personification is "My poet's vanity dies in shame before thy sight."
Personification is a figure of speech in which human characteristics are attributed to something that is not human. In this case, 'vanity' (pride of one's own accomplishments) is capable of dying.
The idea that Tagore wanted to convey by using personification is that every poet is worth nothing when compared to God, who is the best poet of all.
Therefore, correct option is C.
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