Answer :
This letter type is an instance of a formal letter. Formal letter is a business letter. It is an official letter as it is written to people in authority and discusses important matter.
Format of a formal letter
writer's address
date
recipient's portfolio
recipient's address
title or heading
body
conclusion
complementary close
signature
full name
The language is strictly formal.
learn more about a formal letter: https://brainly.com/question/24140747