AP Environmental Science

Answer: D - The crude birth rate is the number of live births per 1,000 persons in one year.

Key Takeaway: Crude birth rates are simply expressed as the number of birth per thousand people in the population. Crude birth rate is not typically a very useful factor for population growth, however, as only women of child-bearing age can give birth and yet both genders and all ages are included in the “per thousand” persons. Thus, fertility rates, based upon the number of live births per 1,000 women, are usually a better representation of how a population is growing.