The birth rate and the death rate are two factors that influence population change. The birth
rate is the number of live births per 1000 people while the death rate is the number of deaths
per 1000 people. These are the natural causes of population change. When the birth rate is
higher than the death rate, population increases. When the death rate is more than the birth
rate, population decreases. When the two rates are equal, the population remains constant.
Thus, the birth and death rates affect the balance of population.