Answer:
There was one dual foundation on which the rest was built; that foundation was: <u>Speed and steam.</u>
Explanation:
Industry was most beneficieted with the notions of speed, and the invention of steam. This dual foundation was the reason why industry could developed faster and also promoted transportation.
Many Americans volunteered to defend the nation from enemy bombing or invasion. They trained in first aid, aircraft spotting, bomb removal, and fire fighting. Air raid wardens led practice drills, including blackouts. By mid-1942 over 10 million Americans were civil defense volunteers. Switch the words up homie
