The birth rate is defined as the number of births in a particular time divided by the total population. So the correct option is A.
A total number of births in a specific time (a year) divided by the total population (usually taken as 1000) is called the birth rate. The birth rate is calculated for various reasons.
Some of the things for which birth rate is needed are population count, universal registration of births etc.
Population growth is calculated using birth rate, mortality rate and migration rate from a population. The mid-year population is usually taken as the estimated population.
The birth rate is also referred to as natality. The rate of natural increase is given when the crude death rate is subtracted from the crude birth rate.
The birth rate of a population should be maintained at a moderate level by providing resources to people with children, creating awareness about methods of contraception etc.
The birth rate is calculated by dividing the number of births by the total population.
Therefore the correct option is A.
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