The Aztecs used<span> chinampas, or "floating gardens" man made islands, for </span>farming<span>.
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number 7: Czar Nicholas II was the last czar, and Russia replaced him with a communist government.
number 8: The treaty of Versailles was the treaty that brought world war 1 to an end.
number 9: Woodrow Wilson came up with the idea of the league of Nations, The League's goals included disarmament, preventing war through collective security, settling disputes between countries through negotiation diplomacy and improving global welfare.
The first Mongol conquests under Genghis Khan was in <span> China.</span>
They started to get more profit and more people from others countries traded many differnt stuff for the farming and other stuff they had.
C is the best choice. The movements were major and kept people busy.