Well, son, i'll tell you: life for me ain't been no crystal stair. it's had tacks in it, and splinters, and boards torn up, and places with no carpet on the floor- bare. (langston hughes, "mother to son") choose one answer.
a. simile
b. hyperbole
c. metaphor
d. personification

metaphor

Explanation:

the answer is: round.

in literature, round characters are considerably complex and experience or are subjected to unpleasant situations. as a consequence, they go through crucial sentimental and psychological development, which can cause surprise in the readers. in this case, juan's dramatic transformation is related to the adversities he meets at school.