In this lesson, we explore the topic of population growth, focusing on key concepts such as birth rate, death rate, and natural increase. Population growth refers to the rise in the number of people living in an area, influenced primarily by the balance between births and deaths. The birth rate indicates the number of live births per thousand people each year, while the death rate reflects the number of deaths per thousand. The natural increase is calculated by subtracting the death rate from the birth rate, illustrating how these factors impact overall population changes over time.