What country has the youngest population?

Education
1

The youngest country in the world is Niger, where almost 50% of the population is below the age of 15.

2

Is there a reason behind this?

4

This is because of young pregnancy, high birth rate. With an annual growth rate of 3.8 percent, the world’s highest, Niger could see its population of 22.2 million nearly triple.

5

I see, that is why.