What part of the united states did the dust bowl affect most directly?

Why is it useful for historians to base certain studies on the analysis of historical periods

In what way did expansion and global trade during the 15th to 18th centuries affect the economies of european countries

How did inca develop their road system? a) they used mortar to hold the stones together.b) they built suspension bridges over rivers. c) they mixed copper and stone together to make the blocks.d) they laid roads in the cities, not in the less densely populated deserts.