Compare the change in population due to birth rate, death rate and migration.

Birth rate is the no. Of live births per thousand of population per year where as death rate is the no. of deaths in a particular population. As Birth rate increases, population increases and as the death rate increases population decreases. Population growth is calculated by calculating the birth and death rate. Migration is leaving one country and settling in other country. So it leads to decrease in population in one country and increase of population in another country.