Since then the Great Wall was built, rebuilt to protect the northern borders of the Chinese Empire from the Hun's and Mongolian attacks during the rule of successive dynasties.
The Industrial Revolution and new jobs in factories contributed to growth of cities in the late 1800's, as did immigration.
what
Explanation:
try ur best ig and then look up the answer
Think most they want migrate to Usa for a better life
C. life after death
is the answer
