A. The formation of new democracies after the fall of the Soviet Union
Just learned this the 5 stages are
fixation or volatilization, mineralization, nitrification, immobilization, and denitrification.
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The best example is their amazing system of roads. The Incas built roads across the length and width of their empire. To create routes through steep mountain ranges, they carved staircases and gouged tunnels out of rock. They also built suspension bridges over rivers.
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