Average population density on earth is
$6$ persons/sq. km
$26$ persons/sq. km
$10$ persons/sq. km
$40$ persons/sq. km
Cause of decline of population in $1927$ was
The physiological capacity of a population to produce offsprings is known as
Which of the following can be taken as the most convincing factor for indicating the rapid increase in population growth of a country?
It is hormone releasing $IUDs$
$NFCP$ stands for