Gravity. Gravity was a theory crafted by man
The correct answer to this is Natural Resources. <span>In the mid to late 19th century, natural resources were heavily exploited, especially in the West. Land speculators and developers took over large tracts of forests and grazing land. Acreage important to waterpower was seized by private concerns.
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Answer:
we should not wear nylon clothes near fire because they are synthetic clothes or we can say artificial fibres they catch fire easily...
