The writer in Frankenstein describes his one crewman as being "as silent as a Turk." What literary device is this?
A. Metaphor
B. Irony
C. Personification
D. Simile

d) simile

Explanation:

a metaphor is comparing two things without using "like" or "as"- this sentence uses the word "as"

irony is when something happens that you do not expect and this doesn't apply to this sentence

personification is giving human characteristics to non-human objects however a crewman is a human

the answer is simile because the author is comparing two things (a crewman and a Turk) USING the word "as"  

The right answer is D) Phrase. A phrase is defined as a short or long group of words that not include the subject-verb pair needed to make a clause. This last one does include both, subject and verb. There are diverse kind of phrases such as nouns one (the red apple), verb phrases (they are watching a movie) and prepositional ones (inside the room, after dinner, etc.). As you can see, there is no need of both verb and subject to make sense in a phrase, it can have logic without one of them.