Answer: Expansive, Constrictive, and stationary
Explanation:1. EXPANSIVE population pyramids show larger numbers or percentages of the population in the younger age groups, usually with each age group smaller in size or proportion than the one born before it. These types of pyramids are usually found in populations with
very large fertility rates and lower-than-average life expectancies. The age-sex
distributions of Latin American and many Third World countries would probably display
expansive population pyramids.
2. CONSTRICTIVE population pyramids display lower numbers or percentages of younger people. The age-sex distributions of the United States and Pennsylvania fall into this type of pyramid.
3. STATIONARY or near-stationary population pyramids display somewhat equal numbers or percentages for almost all age groups. Of course, smaller figures are still to be expected at the oldest age groups. The age-sex distributions of some European countries, especially Scandinavian ones, will tend to fall into this category.
Governments use population pyramids to help them plan for education. The population pyramid shows the number of children in the country; therefore, governments will know how many schools and teachers will be required in the future.
Population pyramids also help governments to plan for care of the elderly. They allow governments to plan for nursing homes and pension provision.
