Answer:
They made there homes out of clay and straw bricks
Senators serve for 6 years at a time, I believe is the answer you're looking for.
I believe the answer is: globalization
globalization refers to the process of interraction and integration that being done by people from different countries. Globalization provide wide opportunities for countries to learn from each other and develop a trading relationship with one another, which would most likely lead to economic growth.
There could be many different reasons.
farming collectives
security needs
