Which persuasive technique does Kennedy use the most in "The Immigrant Contribution"?

Appeal to reason

Explanation:

To persuade the public, Kennedy shows in his speech scientifically, politically and socially proven facts. With that, he shows that the speech is not based on his opinions, or on what he believes is right, but shows that the speech is based on factual, undeniable and real elements that can be confirmed by everyone. Kennedy's position refers to the use of the appeal to reason as a persuasive method. Thus he shows that people must believe what he says, regardless of the faith that people have in him, because everything that has been said is real, factual and concrete.

once upon a midnight dreary, while i pondered, weak and weary,

explanation:

not sure how to answer your question sorry