Since then the Great Wall was built, rebuilt to protect the northern borders of the Chinese Empire from the Hun's and Mongolian attacks during the rule of successive dynasties.
D - primary sources are old and secondary sources are based off primarily sources
Answer:so that society does not devote into chaos.
Explanation:
Answer:
navigate, terrain, coldest.
Explanation:
not sure if they're the right words specifically for your question but similar words should be correct either way, but I know New England colonies were the coldest. they were known to be cold and had similar climate to new England.
The Columbian exchange of crops affected both the Old World and the New. Amerindian crops that have crossed oceans—for example, maize to China and the white potato to Ireland—have been stimulants to population growth in the Old World. The latter’s crops and livestock have had much the same effect in the Americas—for example, wheat in Kansas and the Pampa, and beef cattle in Texas and Brazil. The full story of the exchange is many volumes long, so for the sake of brevity and clarity let us focus on a specific region, the eastern third of the United States of America.
