Answer:
Migration
also causes change in the number of people, but if it is movement of people
within the country (called internal migration), it will not cause a change in
the population, but only change their distribution.
Migration of people between countries (called
international migration) will change the size of the
population besides changing its character or demography.
In India, most migrations have been from rural to urban
areas because of the 'push' factor in rural areas. These are adverse conditions
of poverty and unemployment in the rural areas and the 'pull' of the city in terms
of increased employment opportunities and better living conditions. Migration
is an important determinant of population change.
It changes not only the population size, but also the
population composition of urban and rural populations in terms of age and sex composition.
In India, the rural-urban migration has resulted in a steady increase in the
percentage of population in cities and towns,
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