The Qin introduced common coinage, meaning a form of ´fiat´ currency backed by the central government. It was called a ´ban liang´, and they could be issue by local nobles as well as by the emperor. A system of coinage is important for the unification of a massive empire because it facilitates trade and the recollection of revenue for the central government. As such, it becomes easier to raise a common army, which is essential for unification of different warring states.
B. Trees don't remove oxygen, they give it!
DEsert and cactus hehhehe
Answer:
The Columbian Exchange was more evenhanded when it came to crops. The Americas' farmers' gifts to other continents included staples such as corn (maize), potatoes, cassava, and sweet potatoes, together with secondary food crops such as tomatoes, peanuts, pumpkins, squashes, pineapples, and chili peppers.
Answer:
Social contract theory says that people live together in society in accordance with an agreement that establishes moral and political rules of behaviour. Some people believe that if we live according to a social contract, we can live morally by our own choice and not because a divine being requires it.