Answer:
Dear father,
hope you are doing well father. I am doing good over here and settled comfortably in the hotel. I wrote this letter to request you to buy a computer for me.
As you are aware of the current education advancements. We get a lot of projects that are needed to be made on a computer with the help of power-point presentation. Our school has taken a step to prevent wastage of paper. Therefore, I would request you to buy me a computer so that I can start with my project as soon as possible.
Give love and regards to mother and sister.
Explanation:
I'm pretty sure the first sentence? Everything else sounds a tad opinionated.
Universal is the correct answer.
Universal means something that is applicable in all cases, or can be shared by all people in general, which makes sense in the sentence since you are talking about something that is shared by a wide variety of people. As well, localized means a small group, archetypal means a certain type of person and current means now, none of these fit the description given. Therefore universal is the best choice.
The best time to determine voice & tone in writing is when you are in the beginning/middle of the passage/book/article because you will see what the author is going to talk about and then how he feels about it.