Well ancient Greece was an oligarchy (kind of like a democracy). Greece has City States, as well as Ancient Mesopotamia. Mesopotamia had kings though, but was ran like an Oligarchy.
Answer:
First prompt seems easy.
Explanation:
The most important impact of the Columbian Exchange was the spread of different animals and vegetables.
Now, you can come up with the rest by researching about the Columbian Exchange if you don't know much about it, instead of asking for someone to do the whole document for you. I got you starting line, you're welcome :)
The ancient civilizations developed law codes and the idea of divine kingship based off of what they knew. Law codes, like the code of Hamurabi, were made by the rulers according to the divine belefs. We have the similar example in Islamic countries today, that are secular but also take the law of Sheriat.