Question

17. In saying, "be careful, or you will get lost in the mud," the writer is using:

A. pun.
B. onomatopoeia.
C. climax.
D. simile.
E. metaphor.

Answer 1

A.
It is indeed a pun.
The writer's purpose of this may have been to teasingly warn a character. You can easily cancel out the other answer options as well.