A job is: A compilation of tasks that an employee agrees to complete for an employer. The field of work a person stays in for decades. A long term goal for which someone strives. All of them are correct

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.

this is a good question! i'll do some research and come back when i have the answer!

try e. coli infection