Question

22 how many children must be born per couple to b acement? a it does not correlate b one c two d three

Explanation:

In population demographics, the replacement level fertility is the total fertility rate—the average number of children born per woman—at which a population exactly replaces itself from one generation to the next, without migration. For a couple (two parents), having two children (one to replace each parent) is the basic concept for replacement at a couple - level (assuming no mortality before reproductive age etc. In a more comprehensive population - level, the replacement level is often considered as around 2.1 due to factors like child mortality, but at a simple couple - replacement level, two children (one for each parent) is the key idea.

Answer:

C. Two