Answer: Because we don't want to use up all of the natural resources
Explanation:
its b because the perenpathy is 24
The main reason for the wall's construction had always been defense. Since China's first dynasty, the empire faced a near-constant threat of attack from the nomadic tribes to the north. This included those famed Mongols as well as lesser-known groups like the Xiongnu and the Göktürks.
