B) communicate.
it was the paper they used to write on
One cause was the sheer size of the Mongol empire, due to its size the generals and grandsons of Genghis Khan (the most known Mongol warlord of all time) could not hold it together.
Another cause was that an empire of this size needed more and more administration which was not being done to the level it needed to be, and this eventually led to the decline as well.
The physical and human characteristics associated with the Indus Valley civilization are:
b. streets planned on a grid
c. Hindu Kush Mountains
d. large central granaries.The Indus Valley Civilization was an ancient civilization that lived in the area along the lower Indus river. The area is now Pakistans and Western India. This civilization is considered to be one of the great early civilizations along with Ancient Egypt and the Sumerian Civilization. The people of the Indus Vally Civilization planned their cities in a grid format and they paid attention to personal and public hygiene.
