population distribution - the variations in population that occur across a country, a continent, or the world, primary - economic activities that includes taking and using natural resources from Earth, secondary - economic activity that includes using materials from Earth and making new products from them, tertiary - economic activity that includes providing services to people and businesses, quaternary - economic activities that include the processing, management, and distribution of information, physical features - naturally occurring features on the planet Earth’s topography, including landforms, bodies of water, terrains and ecosystems, formal region - a region defined by a common characteristic, such as production of a product, functional region - a central place and the surrounding territory linked to it, perceptual region - a region defined by popular feelings and images rather than by objective data, elevation - the height of a land surface above the level of the sea, latitude - measurement of distance north or south of the Equator, longitude - measurement of distance east or west of the Prime Meridian,

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