Answer:
C.
Explanation:
Generally, letters are meant to be formal, which means respectful language is used.
The word that best describes the tone of a letter is C. respectful.
It should be noted that tone simply means the mood that's implied by the word choice of that author in a literary work.
In this case, the word that best describes the tone of a letter is respectful.
Learn more about tone on:
https://brainly.com/question/15447799
