Why do demographers believe that birthrates will decline in some developed countries by 2025? a. there are free health-care facilities available to citizens. b. there has been an increase in the infant mortality rate. c. there will be a sudden increase in the birth rate. d. many citizens are choosing to have small families. e. there is a pattern of population migration to other countries.

D. Many citizens are choosing to have small families.

Explanation:

Many demographers believe that birth rates will decline in some developed countries by 2025. This reduction is mainly associated with three factors:

The downward trend in fertility rates is leading to a significant reduction in the birth rate in almost half of the countries, below the so-called replacement level - indicating that the volume of children per family is insufficient to maintain the size of the population in those places.

east-west schism. the greatest effect of the east-west schism was the creation of two separate churches that had previously been unified under one church, the eastern orthodox church and the roman catholic church.

nothing certain is known about what happened, but it seems that the country declined gradually, perhaps due to bad government, or, more likely, due to a series of bad harvests, which resulted in widespread and recurrent famine.