C.The shifting meter emphasizes the erratic behavior of the birds.
Answer: The sun has a wondrous effect on icy birch branches.
Explanation:
Robert Frost in this excerpt speaks of how birches are affected by ice and then by the environment around them from how the birches are bent by ice to how the icy branches are then affected by the wind, rain and sun.
At the end Robert describes the effect the sun has on the branches and notes how the sun enables the birches to shed to snow in such heaps that one might think a part of heaven has fallen. As heaven is considered so beautiful, it must mean that the effect the sun had was a beautiful and wonderful one.
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.
I hoped this helped! :)
Yes. The rest of the book focuses on his change in belief.