A is a permanent concentration of a relatively large number of people who are engaged in mainly non-farming activities.

Please help me!

d is the correct answer

~courtney

there is no chart here so no one can answer this.

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.