Urbanization is a. the construction of tall buildings. b. a reduction in the population. c. the concentration of the population in rural areas. d. the concentration of the population in cities.

The correct answer is D.

Urbanization is the population shift form rural to urban areas. It means the gradual increase in the proportion of people living in urban areas, due mainly to migration associated with seeking employment. Most of urbanizations were created as a response to economic opportunities in cities.

Nearly half of the world's population lives in urban areas today.

The most negative effects of urbanization are: the scarcity of resources like water, environmental pollution, deteriorating health and the rise of organised crime and social exclusion.

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