Because theres gravity that hold it down?
Answer:
Shi Huangdi
Explanation:
Shi Huangdi changed measurements to be the same in all of China. He used the system used in his former kingdom. Later in his rule he constructed three major highways running northeast, southeast, and north and south.
The total amount of roads built by Qin Shi Huangdi was approximately 4,250miles. Canals such as the famous Lingqu Canal was built by The First Emperor, the use of the canals are also very similar to the purpose of the roads. It was also used as an encouragement towards trading, since canals were able to bring people to more trading areas.
Answer:
Mountains and bodies of water
Explanation:
Mountains and bodies of water protected empires as it was the mountains that served as a barrier that protected ancient China and was used as an invasion route by the Aryans into ancient India also water bodies provided agricultural facilities which helped in allowing the empires become more successful.
A sales tax is a tax on goods and purchases.