A.gold because most of it is imported from Africa ( the same to diamond)
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These are oil and gas extraction, coal mining, metal ore mining, nonmetallic mineral mining and quarrying, and mining support activities. Of all of these categories, oil and gas extraction remains one of the largest in terms of its global economic importance.
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abc and bde are two equalateral triangles such that d is the mid point of bc if bd:dc =2:1 then the ratio of the area of ∆abc to that of ∆bde is