Judaism spread in the ancient world primarily by a) forced movement of jews by ancient empires. b) missionary work undertaken by abraham and moses. c) extensive trade networks in the mediterranean sea. d) alexander the great as he moved eastward from greece

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.