With reference to migration, who of the following formulated the ‘Gravity Model’ which demonstrates the relationship between population size, distance and migration?

Human geography or anthropogeography is the branch of geography that studies spatial relationships between human communities, cultures, economies, and their interactions with the environment, examples of which is studied in schools are urban sprawl, and urban redevelopment.

Cultural geography, economic geography, health geography, historical geography, political geography, population geography, rural geography, and social geography are examples of sub-disciplinary studies in human geography that focus on distinct aspects of human activity and organization.