Migrations change the number, distribution and composition of population in

• the area of departure

• the area of arrival

• both the area of departure and arrival

• none of the above

A large proportion of children in a population is a result of

• high birth rates

• high death rates

• high life expectancies

• more married couples

The magnitude of population growth refers to

• the total population of an area

• the number of persons added each year

• the rate at which the population increases

• the number of females per thousand males

Why is the rate of population growth in India declining since 1981?