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.

Atahualpaemperor of the inca empire who rose to the throne after winning a civil war between him and his brother.  -he refused to become a spanish vassal or christian.-francisco pizarro kidnapped him and demanded a huge ransom.  -pizarro's secretary described him as "a man of thirty years, good-looking and poised, somewhat stout, with a wide, handsome, and ferocious face, and the eyes flaming with blood."-after the ransom was paid, atahualpa was killed by pizarro