The following statement best explains how the creation of the European Union caused a demographic shift in Europe.
In quest of work in more developed nations, many flocked to western Europe,option (a) is correct.
A shift in the proportions of the various racial and ethnic groupings that make up a population.Overall, natural change (births minus deaths) and migration are the two most fundamental factors that determine population growth or decline (domestic plus international).A population is what we refer to as a group of individuals residing in a given area. Examples include the American, Indian, and Chinese populations as well as the general population of a city.
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