How do birth, death, fertility, and migration rates affect population size? What factors can affect these rates?© BrainMass Inc. brainmass.com October 9, 2019, 6:48 pm ad1c9bdddf
Birth rate has a positive impact on the growth of the population. It is defined as the number of births that occur per 1000 heads of population. More the number of the children born, the higher is the increase in population. Birth rate can be affected by various factors, like societal pressures, financial reasons, medical advances or simply psychological thinking. Countries of the first world are experiencing very low birth rates because of individualism and lack of interest in family ethos, whereas countries of the third world are experiencing very high birth rates due to societal pressures and sometimes financial reasons as more children mean more hands to earn an income. ...
This solution explains how several factors affect population size.