Final answer:
Core-periphery describes the distribution of power and resources between dominant core areas and less powerful peripheral areas. Distance decay refers to the decrease of a phenomenon's intensity with increasing distance from its source. Chain migration is the movement of individuals through kinship links to the same destinations.
Step-by-step explanation:
Core-periphery is a concept that describes how economic, political, and cultural power is distributed between dominant core regions and less powerful peripheral areas. Core areas are usually urban, technologically advanced, and have a high level of economic development. Conversely, peripheral areas provide raw materials and labor, often have less developed economies, and suffer from a brain drain, where skilled workers migrate towards core areas.
Distance decay is the geographical term describing the decrease in intensity or likelihood of a phenomenon, such as exchange of goods or spread of information, as distance from its source increases. This concept is encapsulated by Waldo Tobler’s First Law of Geography: "Everything is related to everything else, but near things are more related than distant things."
Chain migration refers to the pattern where migrants move along and through kinship links; that is, individuals from a particular town follow others from that town to a particular city or neighborhood, whether in the same country or another country.