Which literary device has been used in the underlined line? "or the sun slumbers in the ocean’s arms"
a. simile
b. imagery
c. personification
d. synecdoche
e. hyperbole

The answer is C: Personification because the sun is given human-like qualities ("slumber").
It can't be A because a simile compares two things using "like" or "as".
It can't be B because imagery refers to the senses. The sentence isn't very.. descriptive.
It can't be E because nothing is being exaggerated in any way.
I'll be completely honest and say that I haven't learned about synecdoche yet, haha.