4. Age structure helps us to plan and evaluate various aspects of economic development. Explain
Give different population pyramids.
Answers
Answer:age
Explanation:Each country will have different or unique population pyramids. However, population pyramids will be defined as the following: stationary, expansive, or constrictive. These types have been identified by the fertility and mortality rates of a country.[6]
"Stationary" pyramid
A pyramid can be described as stationary if the percentages of population (age and sex) remains constant over time.[7] Stationary population is when a population contains equal birth rates and death rates.[7]
"Expansive" pyramid
A population pyramid that is very wide at the younger ages, characteristic of countries with high birth rate and low life expectancy.[6] The population is said to be fast-growing, and the size of each birth cohort gets larger than the size of the previous year.[8]
"Constrictive" pyramid
A population pyramid that is narrowed at the bottom. The population is generally older on average, as the country has long life expectancy, a low death rate, but also a low birth rate.[6] However, the percentage of younger population are extremely low, this can cause issues with dependency ratio of the population.[8] This pyramid is more common when immigrants are factored out. This is a typical pattern for a very developed country, a high level of education,