What is the main occupation of the people of the tropical dessert region

in 342 bc j._c. egypt fell into the hands of the persians, under the reign of nectanebo ii

greek city-states unite in a revolt against the persian empire at the beginning of the fifth century bc. j.-c  

from the year 660 or 659 bc ad, cyrus preached the revolt against the medes to deliver the persians.

answer; randomization;

answer; expert witness;

answer; with few regulations protected the prices of crops which made farmers leave their farms and migrate to the big cities to work in factories;