The river and deserts provided natural defenses for the Egyptians. The Nile River has a marshy delta. As a result, Egyptians could not build a port at the mouth of the Nile. This made it difficult for invaders to reach Egyptian settlements along the river.
Often, the conditions that children and workers worked in were unsafe and they worked long hours with no rest. they worked all day. sometimes they would get stuck in machinery and get hurt or even die. also, working in factories caused health problems for many children and workers.
To keep either house of Congress from becoming too powerful. (Gradpoint)
Answer: the answer is totem poles and potlatches
