Question

To create the proper tone for an argumentative essay,writers should

Answer 1

They should focus on the evidence and use opinionated words. As well as a straightforward approach

Answer 2

Writers shouldn't put the word "I" or put their opinion in an argumentative essay because in this type of essay you have to argue the side with the most evidence.
Of course you have to pick a side to defend and another side to oppose.
Don't forget your rebuttal :p
Hope that helps.