Why did both sides make big trenches during World War I? a) to defend against rolling tanks
b) to protect against poison gas
c) to protect soldiers from artillery fire
d) to shoot down enemy aircraft

Sea exploration became important during the late middle ages because europeans most likely wanted to

Which physical feature minimizes population density in northern africa?

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.