Moreover, in developed countries, the opportunity for education is more available to its citizens. Hence, most of the population are educated. When people are educated, they are less likely to many children. They will be focusing on their careers and bettering their standard of living. Furthermore, because of the opportunities available through education, women in developed countries are marrying late and this usually leads to lower fertility rates. However, in developing countries the opportunity for education is not as readily available to all citizens. Those who live in the city have many opportunities for education but usually, those who live in rural areas are not given the same opportunities. Hence, there will most likely be people who marry young and have many children due to the lack of opportunities to further their studies.
Furthermore, developed countries usually have better health policies than developing countries. Therefore, those who live in developed countries will probably be more aware of the importance of health. They will also have more access to places such as hospitals and clinics where they can go for regular check-ups. Thus, they will most likely have lower death rates caused by diseases. However, developing countries may not have good health policies and thus, their citizens may not have easy access to hospitals or clinics. Thus they will most likely have higher death rates due to diseases.
Apart from that, developed countries will most likely have high immigration rates due to the better standards of living and the increased job opportunities when compared to developing countries. Hence, developing countries may have a higher migration rate. However, developing countries may also have high immigration rates because of increase in job opportunities as the countries are developing.
Therefore, overall it seems that developing countries have higher population growth due to their high birth rate, lower opportunity for education, high death rate due to lack of proper healthcare and high immigration rates due to job opportunities.