Answer:
The alliteration in the first sounds of the words "step" and "sheer", and the consonance of the sound in "hairsbreadth" and "coincidence." The two devices work together to unify the idea that the tiniest of things make all the difference in the way things work out.
Explanation:
Giving the smallest amount of detail
That novel is a parody of a knighthood which was long forgotten. Don Quixote reads chivalric books instead of being the knight himself. He becomes sort of mad - he sees dragons and enemies where there are only windmills. He thinks his love Dulcinea will never age and will forever wait for him - whereas in reality she is just a normal peasant who doesn't even know him. The values of knighthood are mocked in this novel, and that is what makes it a parody.
