The answer choices which are elements of an epic poem’s structure and style are:
The use of poetic verse throughout the epic
A narrative voice that tells the story
Elevated or eloquent, style
Compelling speeches
An epic poem has to do with the journey which a hero undertakes and the various obstacles which he faces on his way and how he is able to overcome them.
With this in mind, we can see that there is usually the use of poetic verse which narrates the journey and the use of narrative voice, eloquent style and compelling speeches which are used to praise the hero.
The purpose of an antagonist in the story is to hinder the main character(s) from achieving their goal. The antagonist does not always have to be the main villain, but just has evil intentions to the main characters. A perfect example of this (in my opinion) would be Boba Fett from<em> The Empire Strikes Back</em>, he was not the main villain, but was hired by the main villain of the original trilogy to stop the main group from achieving their goals, and did have evil intentions towards them.