How do the huge plains in the united states affect the way people live there?

Which of the following inventions most directly allowed ancient farmers to produce a surplus ?

How did the russian revolution impact world war i? a) the russians required the allied powers to come to their aid and defeat the radical groups. b) the russians pulled out from the war, enabling the germans to focus on the western front. c) the russians created new technological advancements that were used by the allied powers to win. d) the russians created a new communist government that aligned with the central powers instead.

What did the japanese regard as the main purpose of the attack