First, Mesopotamia was blessed with especially rich soil. Diverse elevations (there are both high hills and low‐lying marshlands) and climatic variations in the region allowed for the evolution of many types of edible seeds and plants, as well as a variety of farm animals. California did not have it as easy as Mesopotamia did — it had several geographical disadvantages to conquer before its advantages could really shine.
Second, while the great city of Babylon was thriving in Mesopotamia in 3100 B.C., California remained rather insignificant as a trade or cultural center. It was inhabited by nomadic tribes who lived a hunter‐gatherer lifestyle.
Lastly, there was a speedy input of goods and knowledge via the waterways built across Mesopotamia. This was a distinct advantage of the area over competing regions, and allowed their economic and cultural life to flourish.
Total completeness means that every supertype occurrence must be a member of at least one subtype.
<h3>What is total completeness?</h3>
When a relationship is mistakenly or inadequately acknowledged, a depiction that is out of step with reality results. The most prevalent is the fan trap.
The completeness requirement states that any instance of an entity's subtype must also belong to at least one subtype. Complete and partial completion limitations are also viable options.
A circle above a single line indicates partial completeness, which means that some instances of a supertype may not belong to any subtype because not all instances of the supertype belong to that subtype.
One horizontal line is displayed beneath the circle to represent an incompleteness restriction.
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They probably needed to store it to keep it from other people or animals. Also, if there was a drought or flood, they needed a surplus of food stored to survive until farming conditions got better.
