Answer: A.urbanization
Explanation:
And if urbanization was initiated as early as the first Industrial Revolution, the full form of that process occurred during the second Industrial Revolution. This phenomenon has also resulted in negative consequences such as overcrowding. There is the formation of mega-urban centers such as London, New York, Paris, Vienna, and others. In that period, under the influence of Marx and Engels, the first trade unions were formed, which would mean the early struggle for workers' rights.
