Answer: 1494 Treaty of Tordesillas
Explanation:
Hang-t'u is axtually a technique in building walls while the materials used are natural raw materials such as gravel, earth, chalk or lime.
a decrease in overall demand and its causing a declinein GDP
Larger civilizations where formed around more watery land areas like rivers and that shaped humans city’s forever
"The people of ancient Egypt grew everything they needed to eat. The pharaoh got the rich peasants to do the farm work on the rich lands. Most villagers were farmers. ... TheEgyptians grew their crops along the banks of the River Nile on the rich black soil, or kemet which was left behind after the yearly floods." hope this helps