The character from the tempest would be best described as loyal and compassionate would be Sebastion?
Based on the given statement above, I can say that the type of comparison that is being shown is a SIMILE. A simile is a literary technique that compares two unlike objects with the use of the words "like" or "as...as". Apparently, this uses "as...as" in comparing "they" and "bark of a tree". Hope this helps.
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Hope it helped!! :)
