Eliza's appearance as a prim and proper beautiful young lady coupled with her perfect English accent surprised the guests; and they began to speculate as to where she came from. As they listened to her talk, they found her weird but Prof. Higgins explained that it was the "new small talk."
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: