Final answer:
The discussion on class distinction and marriage prospects in paragraphs 13-16 supports the theme of societal expectations influencing individual actions and relationships, particularly in the context of marriage.
Step-by-step explanation:
The words in paragraphs 13-16 that most directly support an important theme in the text highlight the societal views on class and marriage during the period. Specifically, Darcy's concern for social standing and marriage prospects (“But it must very materially lessen their chance of marrying men of any consideration in the world”) contrasts with Bingley's indifference to the uncles in Cheapside (“If they had uncles enough to fill all Cheapside,” cried Bingley, “it would not make them one jot less agreeable”). These conversations reflect the prevalent theme that societal expectations and class distinctions heavily influence individuals' actions and relationships, especially regarding marriage.