In an $Urn$-shaped age pyramid of the population,the trend of growth is:

What effect does natality have on a population?

Study the figure and identify $A, B, C,$ and $D$ in relation to their effect on population density.

The average natality rate in our village is $25$, the average mortality rate is $24$, immigration is $2$, and emigration is $3$. What is the net increase in the population?

List any four characters that are employed in human population census.

Emigration is: