Final answer:
The consequences of 19th-century urbanization included slums, diseases, employment issues, and child labor, all caused by the massive population growth in cities with inadequate infrastructure to support it.
Step-by-step explanation:
The consequences of rapid urbanization during the 19th century were numerous and significantly impacted the social fabric of cities. The most direct outcomes included the emergence of slums, rampant spread of diseases like cholera and tuberculosis due to poor sanitation and overcrowding, widespread and recurrent employment issues, and the prevalence of child labor as families struggled to make ends meet. Cities like New York and London saw their populations explode, which exacerbated housing shortages, sanitation problems, and led to an increase in poverty and crime.