Explanation:
I am having a doubt on no.8.
all the answer might not be correct.some might get wrong. try yourself.
1. I don't think she was betraying her black identity, I think that she was trying to show unity, or make a difference in people's opinion
HOPE IT HELPS
Assuming that you mean physical letters that you are supposed to write, a formal letter would have formal sentences and references. ( No friendly and personal acronyms, EX: OMG) Formal sentences would include more efficient and complex words.