A pyramid is a useful tool to study and analyze various studies. They are used by demographers . These are people who study populations. A population pyramid gives a clear information of how from high fertility to low fertility rate changed take place in a selected region.
So every country can be analyzed their various situations by using a pyramid which makes analysis easy with these graphs and reveals a lot of information of a particular country.
Cities such as Geneva, Switzerland; Brussels, Belgium; and Washington, DC, are considered global cities primarily due to their influence in world government
