All global changes in population size can be understood by reference to fertility and mortality.

Question

Quizplus · Accepted Answer

Fertility and mortality are the two main factors that determine population size. Fertility refers to the number of births per 1,000 people, while mortality refers to the number of deaths per 1,000 people. Changes in fertility and mortality rates can lead to changes in population size. For example, a decrease in fertility rates can lead to a decrease in population size, while an increase in mortality rates can lead to a decrease in population size.

All Global Changes in Population Size Can Be Understood by Reference