Question

The most stable population is that population where the ratio between birth rate and the death rate is:
A. More than one
B. Equal to one
C. Less than one
D. None of these

Answer 1

The birth rate in a period of time is the total number of live births per 1,000 population divided by the length of the period in years.
The number of live births is normally taken or calculated from the universal registration system for births. population counts from a census, and meticulous estimation through specialized demographic techniques. A stable population is one that doesn’t get affected drastically by natural events.

Complete answer: The death rate is the ratio of deaths to the population of a particular area over a particular period of time.
It is usually calculated as the number of deaths per one thousand people per year
1. A natural increase in the population occurs when the birth rate is greater than the death rate. That is, that there are more births than deaths in that population over the year.
2. A natural decrease in the population occurs when the death rate is greater than the birth rate.
This means that more deaths occur in a population than there are babies born, so population numbers decline gradually.
3. In the long term, zero population growth can be achieved/ reached when the birth rate of a population equals its death rate, i.e., fertility is at its replacement level and the birth and death rates are stable, this condition is also called as a demographic equilibrium, unstable rates can lead to drastic changes in population levels.

So, the correct answer is “Option A ”.

Note: When the birth rate exceeds the death rate, the age distribution of the population is also affected. The younger population is more in number than the older age groups. This is known as an expansive population. The opposite is known as the constrictive population.
Here the older age group is more in number than the younger population.