The stylistic element used in the passage is incongruity. It is a form of satire or humor. Incongruity is used in an unsuitable time. For example, If a man were in a court room and belched loudly while receiving his sentence, that would be a use of incongruity. Another example would be if at a royal wedding the groom's pants fell down in the middle of the ceremony.
Thoreau has a possitive attitude toward the outdoors and believe that all people should return to nature as salvation for them. He believes that cities are bad for us.
Answer:
she has a pet dog hasn't she
C. Happily waiting for her husband.