Final answer:
The narrator's feelings about the events in the town reveal his disillusionment and criticism of industrialization. The details supplied by the narrator advance the plot by setting the tone and establishing the theme of industrialization's negative effects.
Step-by-step explanation:
In paragraph 7, the narrator reveals his feelings about the events in the town. From this revelation, we can infer that the narrator is disillusioned and disappointed by what he observes in the town. He describes the town as being filled with smoke from the iron-foundries, which creates a gloomy and oppressive atmosphere.
The details supplied by the narrator in this paragraph help to advance the plot by setting the tone and establishing the theme of industrialization and its negative effects. The description of the smoke and the polluted environment foreshadows the conflicts and challenges the narrator will face later on in the story.