The percentage ratio of natality over mortality is known as
A
Vital index
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B
Population density
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C
Total count of individuals
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D
Fertility rate
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Solution
The correct option is A Vital index A Vital index is the percentage ratio of natality over mortality. It is used to determine the growth of the population. Natality or birth rate refers to the average number of infants born per unit time (usually per year). Mortality or death rate refers to the average number of individuals that die per unit time (per year).