Answer:
C. the need to create defined spaces between combatants
I believe it would be Communist Countries and fascist countries
Answer:
In Chinese history, the Yellow River is not just a river; it stands for the origins of culture and civilization. It played an important role in the early development of Chinese civilization.
Chinese refer to the Yellow river as "the Mother River" and "the Cradle of Chinese Civilization". That is because the Yellow River was the birthplace of ancient Chinese civilizations in the Xia (2100–1600 BC) and Shang (1600–1046 BC) eras — the most prosperous region in early Chinese history.
The correct answer here is (4) Mongols.
The Mongols were a nomadic people who travelled on horseback and were very proficient archers. They were said to be able to shoot a target from full horseback speed with their bows.
They were led by Genghis Khan and conquered a good portion of Asia and also entered parts of Europe. Their empire was one of the biggest ones to date.