Use the image below to answer the following question:
How did this structure benefit China?
![Use the image below to answer the following question How did this structure benefit China class=](https://us-static.z-dn.net/files/d16/28b17195739e46b67b056b9675d728bc.jpg)
Answer:
It was built in the north to protect the empire from foreign invaders.
Explanation: