Final answer:
The sentences in question represent the exposition of the plot, which introduces characters, the setting, and sometimes the conflict at the beginning of a story.
Step-by-step explanation:
The sentence represents the exposition of the plot. This part of the story provides background information and sets the scene for the narrative. The exposition typically introduces the characters, the setting, and possibly the initial elements of the conflict. The setting, described in these sentences, highlights the verdant and idyllic nature of the wood, contrasting starkly with the polluted and grim descriptions of the town in other texts, where nature is obscured by human industry. In writing, the clarity and effectiveness of scene-setting are integral to drawing readers into the story's world.