It is a logical process, that will begin at the top and work it's way down. A conclusion is based and many different theories that are usually assumed to be true or correct.
Dear Mr/Mrs _____,
I am writing to you about my concern for the noise that is being made in the school, and how it is disrupting me and others’ ability to work.
It would be sincerely appreciated if you could take this issue into regards, and talk to the people concerning the disruption.
Sincerely, _____,
Year ___.
The first answer should be correct, as none of the others make any sense.