A theme is the purpose of a text
A compares the speakers reflection to a predatory Burr that haunts the speaker
Hey There!
The figure of speech that uses like or as is simile, this is how you compare things in literature. Similes are most found in poems and quotes.
Hope this helps :)
Here is my fly who will freeze if he drinks do you dream he would fall if he feeds
that is the best ive got
Just google the rhetorical devices