Answer:
The correct answer is C. emphasize that fog surrounds the town.
Step-by-step explanation:
If the poet includes the words "the fog" several times, then it's obvious that they are trying to create emphasis. An author doesn't state something more than once, especially not in every line, unless they believe it contributes something important to the text.
Therefore, the correct answer is. C. emphasize that fog surrounds the town.
Hope this helps! :D