Answer:
B. Hurled headlong flaming from the ethereal sky with hideous ruin
Step-by-step explanation:
Allitetation is a literary device whose main characteristic is repetition of the same letter (or sound) in several close words in a line (or a sentence).
It's main purpose is to emphasize those words and make strong connection between them. As an addition, it makes the poem more appealing.
Here, we see "hurled" "headlong" and "hideous" used in the same line and all starting with the same sound.
For more information, that line is from John Milton's "Paradise Lost".