Population movement can take several forms: immigration is movement into a country, emigration is movement out of a country, and international migration is regulated by governments. People migrate due to various factors, including social, political, economic, religious, and physical factors. Rural areas experience population decline as people move to cities seeking better opportunities and services, pulling people away from rural areas with limited jobs and services in what is known as rural-urban migration. This migration process leads to both benefits and challenges for rural and urban areas.