How was the war in the west different than the war in the east

The Western front was best characterized by trench warfare. The armies dug into the ground, both sides constructing elaborate trench networks. This caused them to reach a stalemate for most of the duration of the war. The Eastern front was much larger and thus did not result in the trench warfare seen in the West.

the answer wold be b) travel among nations should be regulated by an international organization

the indians crossed artificial boundaries, setting the stage for conflict