Become an vetenarian and help animals ! :)
Answer: Industrial Revolution
Explanation: With the advent of Industrialization and increasing production capacities of industrialized production, there was a need for more workers. Large concentration of production in cities has caused migration of the population from rural to urban areas. A large influx of population into urban centers has caused the spread of cities, i.e. urbanization. Thus migration and urbanization are one of the first results of industrial production.
