What contributed to humans producing food

Brainliestt asap!me : ) describe the difference : capitalism vs. communism

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.

Afoot has beats. a) one b) two c) three d) four