A. we went to Pokhara . (into interrogative) b. she does her work carefully ( into yes/no questions)
c. he never obeys his parents .( into affirmative)

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.