Final answer:
Service industries have grown in urban centers due to the shift from manufacturing to service-based economies, the demand for services to support large businesses and functions, and the larger customer base and diverse population of cities.
Step-by-step explanation:
Service industries have grown in urban centers for several reasons. First, as cities have become more industrial and postindustrial, there has been a shift from manufacturing to service-based economies. This means that more workers are employed in service industries such as healthcare, education, hospitality, and finance. Second, urban centers attract businesses and functions that require large thresholds, such as major league sports teams or specialized boutiques, which in turn creates a demand for service industries to support these businesses. Lastly, cities offer a larger customer base and a more diverse population, providing a greater market for service industries.