One way in which the ancient Sumerians, Egyptians, and Mayas are similar is that these civilizations developed irrigation systems.
A) yes- definitely! many mental disorders are genetically motivated
b) yes! a mental disorder can be a result of for example child abuse
so we already see that d. must be the correct answer.
As for physical factors, I think head trauma could be a good example.
Among the choices provided above the <span>nations practice a rigid adherence to endogamy is b which is Cuba.
</span>Residential choice <span>usually separates black </span>Cuban<span> immigrants from white in the various metropolitan neighborhoods.
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