A) migration
B) natality
C) emigration
D) mortality
Correct Answer: D
Solution :
Mortality is the death rate per thousand individuals. Its rate decreases population size and population density. It is due to improved personal hygiene, sanitation and modem medicines. \[\therefore \] \[Morality\,=\,\,\left( 100\,\times \,\frac{Births}{Deaths} \right)\]
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