There are 165 major rivers in the world .
The crust is the part you walk on, and it's the surface of the earth.
I would like to refer you to this website, it has everything you are asking about--
http://thediplomat.com/2015/01/china-the-influence-of-history/
Hope this helps!
Answer:
Silk Roads, Sea Roads, and Sand Roads?
Explanation:
The desire of elites for hard-to-find luxury items
from distant parts of the Eurasian network, as well as
the accumulation of wealth, especially among
merchants who participated in the trade, motivated
long-distance commerce. Sustaining the commerce were the support of empires and smaller states that benefited directly from the trade; the spread of religious traditions, including Islam and Buddhism, that through shared beliefs tied merchants and sometimes whole societies together over wide regions; and the development of technologies like larger ships and the magnetic compass.
