Which part of speech is not appropriate in formal writing, but often used in daily conversation?
a. conjunction
b. preposition
c. interjection
d. adverb

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.

i think the answer is d.