9. Use the Internet to learn about population pyramids, a way to present information on the age profile of different countries’ populations that is related to the demographic transition. Find two countries with regular pyramid-
shaped populations, and two countries with square or even inverted pyramid populations, and use demographic transition theory to explain the causes and consequences of these age profiles. You can find these easily at the following U.S. Census Bureau Internet site: www.census.gov/ipc/www/
idbpyr.html.