Your answer should be WHO.
Think of it like this: You wouldn't say "The boy it (a variant of 'which')", because it simply just sounds odd. Instead, you're wired to think "The boy, he (an unknown name, so it would be 'who')".
Answer:
Brother I should attend this school class so I can learn new thing/stuff and get educated and become some thing in life and earn to good will for you and parents and we will buy a new big house
I just give you an idea you may add more
The last line I believe is the answer
Answer:
C this helps the reader feel the characters emotions. -Your friend, Bill Cipher
Explanation: