How did imperialism increase the battlefield of the war

(I got this from another user, but whatever...)

Imperialism affected World War I in several ways, such as shaping political alliances between nations engaged in the war and by diverting attention away from domestic issues and towards economic improvement achieved by nations gaining control of African lands. Britain, the United States, Russia and Germany acted as key players by engaging in imperialism during World War I. They sought to gain critical resources and establish an international presence through imperialism, which also allowed them to gain political control.

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couples could only have one child to reduce the population growth.

this forms a narrow, steep sided inlet (sometimes deeper than 1300 metres) connected to the sea. the terminal moraine pushed down the valley by the glacier is left underwater at the fjord’s entrance, causing the water at the neck of the fjord to be shallower than the main body of the fjord behind it.