The correct option is A Decrease in death rate, maternal mortality rate and infant mortality rate
Population explosion
Population explosion refers to the increase in population drastically within a short period.
Causes of population explosion
The causes of population explosion are as follows:
1) Increase in the birth rate.
2) A rapid decline in death rates like MMR (Maternal mortality rate) and IMR (Infant mortality rate). This is due to the advancement of medicines and regular health checkups.
3) Increased life expectancy due to the enhancement and awareness of medical facilities in society.
4) An increase in the number of people of reproducible age.
Final answer
(A) Decrease in death rate, maternal mortality rate, and infant mortality rate