Who were the first known people to settle in the Fertile Crescent region practicing agriculture and domestication of animals?

Sumerians

Explanation:

Because of this region's relatively abundant access to water, the earliest civilizations were established in the Fertile Crescent, including the Sumerians. Its area covers what are now southern Iraq Syria, Lebanon, Jordan, Palestine, Israel Egypt and parts of Turkey and Iran

.elections are held to determine who serves in congress.

i confess that there are several parts of this constitution which i do not at present approve, but i am not sure i shall never approve them: for having lived long, i have experienced many instances of being obliged by better information or fuller consideration, to change opinions even on important subjects, which i once thought right, but found to be otherwise. it is therefore that the older i grow, the more apt i am to doubt my own judgment, and to pay more respect to the judgment of others.