Urbanization: Urbanization is the process by which an increasing proportion of a population resides in urban areas rather than rural ones. It involves the physical expansion of cities and towns along with social and economic changes.
Megacity: A megacity is an extremely large urban area typically characterized by a population exceeding 10 million people. These cities face unique challenges due to their massive size and complex social dynamics.
Suburbanization: Suburbanization refers to the outward expansion of cities into surrounding suburban areas as people move away from densely populated urban centers in search of more space or better living conditions.