Answer :
The answer is Parallel construction and Loaded language
The parallel construction refers to the repetition of a chosen grammatical form within a sentence or paragraph. It uses word, phrases or clauses that are grammatically similar or identical in structure, sound, meaning, or meter. It aims to show that the ideas are equally important and to give a natural flow while reading the piece of writing.
Lincoln uses it in the following excerpt: "we cannot dedicate, we cannot consecrate, we cannot hallow this ground." He chooses to repeat the grammatical form: pronoun + cannot + verb base.
Loaded language is found in any type of speech that uses words and phrases that has a strong connotations that appeals to the audience's emotions. Lincoln uses this type of language in the Gettysburg Address, as a way to appeal to the emotion of the loved ones of those who died in the American Civil war and to honor, in some way, the memory of the fallen soldiers.