I believe the correct answer is: They used the iambic meter to imitate the classic style.
At that time, the authentic American lyrical voice was not yet fully established. Pioneers such as Phillis Wheatley (pre-revolutionary era), Philip Freneau, and later Longfellow, all used the iambic meter (among other forms of meter) - first of all, because it is natural to the English language, and second, because they wanted to build on European tradition. Only Whitman would break up with it and establish an authentic American voice.
What is the article about?
A full-sentence outline is the same as an alphanumeric outline except that it uses full sentences. Not sure what exactly you meant by what it “uses” but I hope this helps a bit.
write what you are into. I have written three books myself and one of teachers read them and she liked them. just write what is in your heart.