Answer:
In Abraham Lincoln's "Emancipation Proclamation" speech, the appeal that is most effectively used is ethos, or ethical appeal.
An example is in paragraph _, when it says, "that on the first day of January, in the year of our Lord one thousand eight hundred and sixty-three, all persons held as slaves within any State or designated part of a State, the people whereof shall then be in rebellion against the United States, shall be then, thenceforward, and forever free."
Explanation: :>