Based on Your dictionary, it states: “Parallelism has slightly different meanings, depending on the context, but it’s about balancing the weight or structure of ideas and phrases. In rhetoric, parallelism means balancing two or more ideas or arguments that are equally important.”
I would have to say it's part of the theme. Morality and politics is the ethos of the story, aka origin aka theme. With-out a theme there would be no plot...and no setting. So... C. Theme
