Anil has noticed that infertility has been affecting many of his intergenerational friends and family. Based on this observation, Anil is writing his senior thesis on the effects that certain cities, water quality, and hormones might have on his friends. Anil will most likelyapproach his findings and paper using which theory? Demographic transition theory Cornucopian theory Zero population growth theory Malthusian theory

(ZPD) Zero population growth illustrates essential demographic phenomena that is important for students to understand during a community unit entity. It is referred to as that is unchanging it neither growing nor declining the growth rate is zero. This demographic balance could occur when birth and death rates are equal. ZPD also accounts the immigration so that it is not just that it happens equally in death and birth rate as same. A country that reduces the ZPD growth has the population where birth plus immigration are equal to death plus emigration are equal over a year. When taking the population growth in the whole world, immigration and emigration do not apply for ZPD would be fulfillment simply when global birth and death rates are equal.