All but one of the factors listed is a major contributor to world population increases. that factor is a) increased birth rate b) decreased death rate c) increase immigration to foreign countries d) an increase in the quality of medical care

D) Increase the quality of medical care.

The major cause of population explosion or increases is due to increased birth rate and decreased death rate. Due to rapid development of science and technology, the medicinal field has improved its quality in all aspects.

During past periods, birth rate was decreased due to premature delivery, fetus born death, death during pregnancy, etc. But now due to increase in the quality of medical care, these entire problems have been rectified and the birth rate has increased which has paved way for population increase.

affects the water bodies: excessive use of fertilizers causes eutrophication. the fertilizers which are used on plants affect the quality of land on which it is used, further causing erosion of soil. the fertilizers used on plants contain harmful chemical fumes which affect the environment.

name and explain one of the event that occurs during meiosis that increases the variation in offspring even more than simple reproduction?