What do birth rate, death rate, immigration, and emigration determine about a population?

Birth rate, death rate, immigration, and emigration are crucial demographic factors that determine the population size and its changes over time in a given area.

1. Birth Rate: This is the number of live births per 1,000 individuals in a population per year. A high birth rate indicates that many babies are being born, which, if the death rate is not correspondingly high, can lead to an increase in the total population.

2. Death Rate: Also known as mortality rate, this is the number of deaths per 1,000 individuals per year. A high death rate can decrease the population if it is not offset by a high birth rate.

3. Immigration: This refers to the arrival of individuals into a population from another location. Immigration increases the population as new individuals are added to the population.

4. Emigration: This is when individuals leave a population to move to another place. Emigration decreases the population as members of the population are removed.

The combined effect of these factors determines the population's growth rate. If the birth rate and immigration exceed the death rate and emigration, the population will grow. Conversely, if the death rate and emigration exceed the birth rate and immigration, the population will decline.