Final answer:
Vivid characterization and imagery illustrate the oppressive nature of Winesburg, explaining why George feels the need to leave for a new beginning.
Step-by-step explanation:
The author uses vivid characterization and imagery to bring the town of Winesburg to life, crafting a setting so tangible that the reader understands why the character George is compelled to leave. By depicting the town with details such as the 'black, slimy pools on the muddy streets' and smoke that 'rolls sullenly in slow folds from the great chimneys,' the author conveys a sense of oppression and decay. This environment contrasts sharply with George's desire for a fresh start and reinforces his decision to seek a better future elsewhere.