External migration refers to what type of movement?

External migration specifically pertains to the movement of people from one country to another, which can also encompass various forms of migration such as voluntary migration for work, refugee movement, or seeking better living conditions. This type of migration significantly impacts the demographic, cultural, and economic aspects of both the sending and receiving countries.

While movement across state lines involves migration within a single country, it does not qualify as external migration since it doesn't cross any national borders. Movement involving long-term residence is a characteristic that can apply to external migration, but it does not define it. Seasonal changes refer to migration patterns such as those seen in agricultural labor, which again remain within the context of internal migration rather than external. Thus, the definition of external migration is most accurately represented by movement between countries.