What effect do limited resources and unlimited wants have on the economy? p.7

It means that people never get enough, that there's always something else that they would want or need. Unlimited wants and needs are one half of the fundamental problem of scarcity that has plagued humanity since the beginning of time. The other half of the scarcity problem is limited resources.

answer; native americans who sometimes actively impeded railroad construction; physical obstacles like rivers and canyons, and

a. european colonies