The rhythm of the excerpt supports the theme of the poem, because the rhythm is consistent, and Poe celebrates the simplicity of young love.
And here is why I think so... At this point in the poem, we still don't see anything bad that is about to happen. He is just talking about a young woman whose only care in the world is to love the narrator, and be loved by him. Later on in the poem we will see why that is impossible, but here, there is still no word about that.
A. They can portray imagery via the written word by making it stand out with either an underline or in bold letters. B. He uses imagery all the time and an example would be (depending on the story) when Jack and Jill went up the hill to fetch a pail of water and you're able to imagine what it may look like. C. On this one I don't know how to help you. I hope A and B help.
