Which north american industry requires workers to dig down into the earth to search for and recover natural resources? a) agriculture b) forestry c) mining d) ranching hint: this is the most dangerous job and often requires large machines. answer is mining mining in north america forces workers deep inside the earth digging for many natural resources. workers and machines dig for coal, steel, silver and even gold in north america.

How did the mountains on the oregon trail influence the timing of pioneers’ travels? a.) the pioneers wanted to avoid times when there was snow in the mountains. the pioneers wanted to spend as much time as possible enjoying the mountain scenery. b.) the pioneers crossed the mountains in late fall when the trees were bare and the views were good. c.) the pioneers were rugged people who were not impacted by the terrain they crossed at any time.