If birth rates fall below the replacement level, then a country is in which stage of demographic transition? a. urbanization/industrialization b. mature industrial c. postindustrial d. pre-modern

C: post industrial stage

Explanation:

If birth rates fall below the replacement level, this means that the country is in post industrial stage. The post industrial stage occurs when the birth rate of a country gets lower than replacement  level.

Replacement level is simply indicative of the level at which fertilization is being carried on in a population. or  It means that it indicates the replacement rate of one generation to the next. In developing countries like US and Canada, the replacement level requires every woman to give birth to 2.1 children.

So, what happens during the post industrial stage that the citizens of a state get better health and living facilities overall. They have better educational facilities at lower cost, Improved system of health and medicines, a strong and independent economy and an overall prosperity throughout the country.

Hope it help!