You didn't italize or mark the phrase, but I see one good candidate:
"The circus animal trainer" is in a way another name given to Mervin, a kind of "renaming" him: this is called an appositive phrase, so if this was the phrase appositive phrase is the answer! (also, I don't see the other phrases here).
A comparison using like or as is a simile.
Super hard question but I think a mechanical pencil
That he/she has a strong belief in religion.
Answer: The details show that Boxer is tireless.
