Concept:High population growth occurs when the number of births is greater than the number of deaths, causing a natural increase.
Explanation:When birth rates are higher than death rates, more people are added to the population than are lost.
This leads to a positive natural increase in population size over time.
If birth rates equal death rates, population growth is zero or stable.
If emigration equals immigration, the change caused by migration is zero, which does not cause high growth.
Therefore, the condition for high population growth is
Birth rate>Death rate.
Answer:D. birth rates are higher than death rates.