Answer:
They provided trading routes, also helped people travel, it provided electricity through hydroelectric dams, and last but not least, it was a source of drinking water.
Explanation:
I know you said 2, but I gave you 4 for incase you want to use more.
Yes because of the mountainous area which can be a great danger for ambush.
Long hours, no breaks, ...........
1930s The Great Depression
