The significance of this quote is Montag's realization of what his job is actually about and what it implies. He became a fireman because he was meant to. However, he is now haunted by this new feeling and does not know anymore what is right and what is wrong.
The question above is an excellent example of a word analogy. A word analogy is usually used to indicate the comparison of elements containing similarities in their definition. For the case above, it establishes the industry to its product thus the answer would be the third choice "cars."
D ....it’s turns to 0.222222222
Homophones........................................