Who punishes Echo and why?

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.

in my opinion, ap calculus was the most difficult. i often struggled with it a lot. however, i have gotten a lot better.