Question

Demographic pyramid definition

Answer 1

A pollution pyramid is also called as age pyramid
is a graphical illustration that shows the disturbance
of various age group in a pollution.which forms the shape of pyramid.when the pollution is growing.

Answer 2

A population pyramid, also called an "age pyramid", is a graphical illustration that shows the distribution of various age groups in a population(typically that of a country or region of the world), which forms the shape of apyramid when the population is growing.