When a population’s birth rate equals its death rate, there is population growth.
a. low
b. zero
c. high
d. moderate

When a population’s birth rate equals its death rate, there is zero population growth. This is often abbreviated as ZPG or also called as the replacement level of fertility. When this happens the population neither grows nor declines. All countries aspire to achieve this ideal growth to ensure sustainability.

Everyone’s hair grows differently.