People spent more time trading and less time farming. New trade routes enabled people to leave their settlements.
Trade helped people exchange culture, resources, and ideas.
Increased trade led to specialization in new areas such as religion.

Which is correct?

Urban growth invariably feeds increased commercialization and industrialization. it requires continually expanding land areas. when urbanization rates are high, and countries do not have the institutional and managerial capacities or economic wherewithal to manage such rapid growths, they exert intense pressure on the types and nature of the resulting settlements. they contribute to the development of overcrowded slums and shanty towns without adequate essential services and necessary infrastructure.-by asit k. biswas and cecilia tortajada