I would say alliances and nationalism because nationalism only encouraged countries to go to war and prove that they were the best most powerful country around and in terms of WWI, nationalism led to strong dedication to the army and just keep most countries in the war longer than they should have been in it. Alliances were significant in the exact beginning of the war and the scale to which the war was fought. The many (secret) alliances led to austria-hungary and Serbia to sorta threaten each other, which brought Germany in, then France, etc.
The ancient people were moving west.
The bridge that you are referring to was called the Bering land bridge which is now the Bering Strait. During the Ice age, though this area was covered in ice which made the sea levels drop and emerged the land bridge, the land bridge was covered with grasses and low shrubs which provided food for the mammoth, horses, caribou, and bison. It is believed that the ancient people followed these grazing animals from beringia (which is now SIberia) and into America, they are believed to be the first inhabitants of America. Over time the weather got warmer and the glaciers started melting and the bridge started disappearing into what we now call the Bering strait this all happened about 11,600 years ago
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<em>i believe that the answer is c</em>
Athens elected leaders at random while Romans were voted in by the leadership.
Hope this helps
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Imperialism had a negative impact on the colonies. Native culture and industries were decimated under alien domination. Local artisan industries were wiped out by imported items. Colonial powers kept colonies from building industries by exploiting them as suppliers of raw resources and consumers for manufactured goods.
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