Rural, People living in places with few inhabitants (villages)., Urban, People living in places with a large population (towns and cities), Children, Population between 0 and 15 years old., Adults, Population between 16 and 64 years old., Elderly, Population over 65 years old., Active, People currently working or looking for a job., Inactive, Retired people, children, students, people who do not work., Birth rate, It refers to the number of babies born per year., Death rate, It refers to the number of deaths per year., Migration, It refers to the movement of people from one area to another., Immigration, People coming to a new country to live., Emigration, People leaving their own country to live somewhere else., Rural exodus, People migrating from rural areas to urban areas., Population density, It is the number of inhabitants in an area per kilometre square..

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