The demographic transition model describes the population change over time as a country becomes more developed. age-structure diagrams describe how populations are distributed across age ranges. which of the following age-structure diagrams best displays the age ranges in a country that is in stage 2 of the demographic transition?
a. a stationary age-structure diagram
b. an inverted pyramid age-structure diagram
c. a constrictive age-structure diagram
d. an expansive pyramid age-structure diagram

An expansive pyramid age-structure diagram best displays the age ranges in a country that is in stage 2 of the demographic transition.

Option d

Explanation:

The shift in demographics from high death rates and high birth rates in societies with lower education, technologies and economically under developed to demographics of low death or birth rates in societies with advanced technology, higher education and persistent economic development and includes the stages between both the scenarios stated is named as demographic transition.

This is to suggest or evaluate the growth rate cycles of the population of the country. There are 3 types of population pyramids namely,

Expansive population pyramids - shows the population that has the greater percentage in younger age groups. Most of the 3rd world nations fall in this category.

Constrictive population pyramids - shows declining birth rates

Stationary population pyramids -  depicts equal proportion of population in all age categories.

heat released by collision processes during accretion, and heat from decay of radioactive elements

explanation: