In these lines, imagery is used to help readers understand what the setting? "We waited and waited for a minibus to come by. Under apartheid, the government provided no public transportation for blacks, but white people still needed us to show up to mop their floors and clean their bathrooms. Necessity being the mother of invention, black people created their own transit system, an informal network of bus routes, controlled by private associations operating entirely outside the law. Because the minibus business was completely unregulated, it was basically organized crime. Different groups ran different routes, and they would fight over who controlled what. There was bribery and general shadiness that went on, a great deal of violence, and a lot of protection money paid to avoid violence. The one thing you didn’t do was steal a route from a rival group."