Bell–shaped polygonal pyramid indicates
Moderate percentage of young individuals
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 a pyramid when the population is growing. In a bell-shaped polygonal pyramid, the number of young individuals (more than the age of 30) is moderate while the number of children is more.