A) red sea
B) diatomaceous earth
C) pseudorocks
D) red tides
Correct Answer: B
Solution :
[b] The diatom shells accumulating up at the bottom of oceans over millions of years formed deposits called diatomaceous earth. These deposits may be thousand metres thick with as many as five million diatom shells in each cubic centimetre. This diatomaceous earth is used in many small and large scale industries.You need to login to perform this action.
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