Birth rate is called

mortality
vital index
natality
viability

The correct answer is C. natality.

  • Mortality is the number of deaths in a population per 1,000 people per year.
  • Vital index is a measure of the overall health of a population, calculated by combining the birth rate and death rate.
  • Viability is the ability of an organism to survive and reproduce.

Natality is the number of births in a population per 1,000 people per year. It is a key indicator of a population’s growth rate. A high birth rate can lead to a population boom, while a low birth rate can lead to a population decline.