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The correct answers would be Much grassland has been converted to grow crops, The soil is rich in nutrients, and Many birds of the grasslands build their nests on the ground.
Explanation:
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The Ming emperors made it their capital in 1421 and it remained China's capital till 1912 when the Manchu Empire fell and SunYat Sen turned China into a republic.
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Oil, natural gas, and coal are considered nonrenewable resources because their formation processes take thousands of years, whereas water can be reused after processing and the wind never stops blowing. This is why the latter two are also much more sustainable ways of generating renewable energy.
The man who proposed the cycle of erosion is William Morris Davis
