Demography is a population characteristic that describes which aspect?

Demography is a population characteristic that describes which aspect?

• A. Age structure
• B. Genetic diversity
• C. Migration patterns
• D. Reproductive rates

Answer: (D)

Demography centers on how population size changes over time, driven most directly by the rate at which new individuals are produced. The reproductive rate measures births per time period, so it directly determines whether a population grows, shrinks, or stays stable, making it the clearest indicator of demographic change. Age structure describes who is in the population by age, which is informative for planning and understanding future trends but does not by itself quantify how fast the population is changing. Genetic diversity concerns variation at the genetic level, not population size dynamics. Migration patterns affect where people are rather than how many new individuals are produced, so they influence composition and distribution but not the inherent reproductive output that drives growth. Therefore, reproductive rates best capture what demography describes.

Demography centers on how population size changes over time, driven most directly by the rate at which new individuals are produced. The reproductive rate measures births per time period, so it directly determines whether a population grows, shrinks, or stays stable, making it the clearest indicator of demographic change. Age structure describes who is in the population by age, which is informative for planning and understanding future trends but does not by itself quantify how fast the population is changing. Genetic diversity concerns variation at the genetic level, not population size dynamics. Migration patterns affect where people are rather than how many new individuals are produced, so they influence composition and distribution but not the inherent reproductive output that drives growth. Therefore, reproductive rates best capture what demography describes.