Question

"Sorrow knocked at my door, but I was afraid" is an example of

Answer 1

"Sorrow knocked at my door, but I was afraid" is an example of D. personification.

Personification is a literary device in which animals, objects or ideas are given human attributes. In this case, sorrow is given the ability to knock at someone's door, but as we know it is only a figure of speech because sorrow cannot knock at the door.

Answer 2

D.)Personification
Its because the example gives sorrow a human action like knocking.
I hope I helped!