Question

in a population birth death ratio is called

vital index
vital value
drought index
survival index

Answer 1

Vital index is known as the ratio of number of love births to the number of deaths during a fixed period in a particular population.

It is commonly used for calculating the growth rate of a country or population.

With increase in vital index, there is an increase in the rate of growth of population in the country, whereas the rate of growth is diminished when vital index is low