What is the form of this poem?

blank verse

lyric

epigram

haiku

done
birches
by robert frost (excerpt)

when i see birches bend to left and right
across the lines of straighter darker trees,
i like to think some boy’s been swinging them.
but swinging doesn’t bend them down to stay
as ice storms do.

If music be the food of love, play on; give me excess of it, that, surfeiting, the appetite may sicken, and so die. that strain again! it had a dying fall: o, it came o'er my ear like the sweet sound, that breathes upon a bank of violets, stealing and giving odour! now read the excerpt from "the love song of j. alfred prufrock." for i have known them all already, known them all: have known the evenings, mornings, afternoons, i have measured out my life with coffee spoons; i know the voices dying with a dying fall beneath the music from a farther room. what does the phrase "dying fall" most likely mean in both excerpts