I would say it's a simile because they are comparing with using the word "like". They are comparing there howling to the wolves.
A meaningful quote and/or a universal idea could serve as hooks for the introuction of a literary analysis.
An analgy or metaphor is typically used in a compare contrast essay, a definition of terms is more for a research paper as is a startling fact.
Thank you to all that came in this winter coldness. You were all very brave to have come to....
Answer:
I read the book series The Reckoners
Explanation: