Is the number of people living in a square mile. in the future, economically developed nations may not have enough money to take care of older citizens due to . in low-income nations, is one reason for the low standard of living.

Population density

Explanation:

Because population density is the number of people living in a square mile.In the future,economically developed nation may not have enough money to take care of older citizens due to. In low income nations,is one reason for the low standard of living.

The answer will be population density

from my own personal expirence food stamps has alot this makes it eaiser so we can affod bills and so we can life a better lifestyle not needing to worry about paying actual money to buy food since most people spend 100-300 dollars a month on food so this alot so we can afford other bills and other stuff we need