Mongols affected Ancient China by attacking most of China's north. In the Qin Dynasty, Qin Shi Huangdi joined up smaller walls in the north which became the Great Wall of China
Ha you need to research and do it not ask someone
to keep enemys and predators
(a) is the answer in studying this actually!
When the price of a good rises the amount demanded decreases and when the price of a good falls the amount demanded increases
