North and Central <span>Asia</span>
<span>One of three methods that could be used to plan a population is making a law where childbirth is limited in number. Another method is to encourage the adoption or fostering of children with no parents. A third method of planning a population is to limit who in the population can reproduce.</span>
Answer:
The answer is C
Explanation:
After the invention of a plow and other tools less people were needed to complete the job.