Answer:
His big words are alibe for us toaday means, woven into a skillful narrative to create a biography of this great Civil Rights leader.
I am going to have to put down #!
An exaggeration is the correct answer
I think the answer is shellfish
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.