Population Density: Population density refers to the number of people living in a specific area, usually measured per square kilometer or square mile. It helps us understand how crowded or sparse an area is.
Migration: Migration is the movement of people from one place to another, either within a country (internal migration) or between countries (international migration). It plays a significant role in shaping global population distribution.
Megacity: A megacity is an urban area with a population of over 10 million people. They often have high population densities and face unique challenges related to infrastructure, services, and resource management.