What is the most effective way to include a formal tone in an argumentative essay? Provide reasons and evidence to support an argument.
Include information from well-known publications.
Balance simple sentences with complex sentences.
Include an interesting statistic or fact in the introduction.

Provide reasons and evidence to support an argument.

Explanation:

An argumentative essay is a type of essay that is made to state a claim, give new evidence about a claim in order to back up such claim.

One of the most effective way to include a formal tone in an argumentative essay is by providing reasons and evidence to support an argument.

samuel gompers was an extremely important person in the american labor movement, being him an employee all his life he devoted himself to fight for the rights of his pairs, he believed they all had the right to have better thing and that they all were working for them but the factory workers were greedy, ambitions and socialist people for him who he didn't have a good concept of.

he gave so many speeches and led so many strikes and protest to fight for equality which he considered employers didn't want to accept, so he had an absolutely negative opinion of them.