Respuesta :

Answer:

The wall served as a great defense for China against invaders from the north. The Zhengguo Canal was an important achievement of the Qin Dynasty. This canal was constructed for the purpose of irrigation of farm land in China's Guanzhong region.

Explanation:

GeraldoXhaja
To protect the Chinese Empire.
Act more as a psychological barrier between the northern and southern civilizations.
To protect Silk Road Trade.