A. between the rising action and the climax
reason of this is because the rising action mean that something sparked something else and now there is going to be a problem. The problem comes at the climax when you are facing the problem. Think of a movie like avengers, rising action was when Loki wanted to kill his brother Thor so he got frost giants to kill citizens of New York just to get his brothers attention. Climax is when they are fighting each other- hence facing the problem.
Answer: It means you have to plan it out, as in understand what and how you're going to write the letter.
Hope this helps!
The tone of the person that is reading it and the background noise
I can’t think of a third one