Not sure but my best guess is to go with B. It just makes the most sense.
Farm mechanization refers to the use of agricultural machines to take the place of manual labor on farms.
In artificial selection, nature provided the variation, and human selected those variations that they found useful
Fossil fuels release carbon dioxide gas when they burn which adds to the greenhouse effect and increases global warming. Of the three fossil fuels, for a given amount of energy released, coal produces the most carbon dioxide and natural gas produces the least.
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In this whole little thing you got going its a
