Which of the following areas for early civilizations did not depend on annual river flooding for agriculture?
a. the huang he valley
b. mesoamerica
c. mesopotamia
d. egypt

most people now work in jobs where they do one  kind  of work; they are carpenters, bankers, cooks, mechanics, and so forth. likewise, most  businesses produce  only certainkinds  of  goods  or  services, such as cars, tacos, or gardening  services. this feature of  production  is known as specialization.

profound political, administrative, and social changes in the british isles.