Question

Which one of the following causes population explosion?
A. Decrease in death rate, maternal mortality rate and infant mortality rate
B. Decrease in the death rate and increase in maternal mortality rate
C. Decrease in infant mortality rate and increase in death rate
D. Decrease in infant mortality rate and decrease in the number of people in reproductive age

Answer 1

Population explosion means increase in number of population. Decrease in death rate of individuals causes increase in population. Maternal mortality rate is the rate of death of females giving birth to the baby. Infant mortality rate is the rate of child death. Decrease in all these factors can lead to population explosion.

Complete answer:
Higher growth or increase in the number of populations can lead to the population explosion. Over the last decades, the population of the world has exploded. The rapid increase in the number of people can cause population explosion. Four main factors which affect the rate of population are: Birth rate, death rate, immigration and emigration.
Death rate is the rate of individuals who died in a particular time period. Maternal mortality rate is the rate of the death of females while giving birth to the child. Rate of mortality is decreasing due to advancement in the medicines and treatment facilities and this could lead to population explosion. The birth rate of children is increasing causing a decrease in infant mortality rate. If the death rate of the individuals is low and birth is increasing day by day this could lead to an increase in the population of the world.
Due to overpopulation the world is facing serious problems like: pollution, extinction of particular species, less resource availability, poverty, etc.
From the above information we know that decrease in death rate, maternal mortality rate and infant mortality rate causes population explosion.

Hence, the correct answer is option (A).

Note: The leading causes of overpopulation are poverty, poor contraceptive use, child labor, reduced mortality rate, fertility treatment, and immigration. Overpopulation has many negative effects on the environment: water scarcity, lower life expectancy, extinction, resource consumption, increased intensive farming, and faster climate change.