What are the major differences between ancient california and mesopotamia?

The correct answer is the following.

The major differences between ancient California and Mesopotamia are the following.

When cities in Mesopotamia were well established and prosperous such as the case of Babylon, in ancient California there were just Nomad tribes that hunted animals. While in large cities of the Sumerian region people farmed the land, in ancient California the Nomads had no clue about growing crops. They had to hunt big animals for survival. Indeed, Mesopotamia is considered the birthplace of agriculture. Another big difference between Mesopotamia and ancient California is that people in Summer built magnificent buildings called Ziggurats (the equivalent of a Pyramid for the Egyptians). Those Ziggurats were built to honor their gods. Meanwhile, in ancient California, people did not build anything considerable.  

answer; the region experienced a surplus of food;