Answer:
Columbian Exchange
Explanation:
The exchange of goods and services between the Native Americans and the Europeans was called the Columbian Exchange.
The main reason why rice became a Chinese staple food during the Tang dynasty was because it was so plentiful and had all the basic nutrients that were needed for survival.
Answer:
b
Explanation:
late 16th and early 17th centuries
If our allies have a national threat. If we decide to help other countries, such as the Korean war. If we were attacked first.
