Answer:
It's an informal letter
Explanation:
Because it is written to people who you know.
You first of all start with writing the topic of the letter, then be concise and give adequate details, write the introduction, body and then give conclusion of the letter.
This are the right steps to follow in order to give / write a good letter.
I guess it be of help in any way to you.
I would say the best answer here would be the B answer.
