4. North America also has 9 million square miles of wilderness that contains Bison with rumors of _
and _,_
million.

Coal

Explanation:

boundary is what it refers to hope this

explanation:

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.