It has been revealed that lakes whose bedrock is made of granite (granitic bedrock) are seriously experiencing depletion of living organisms.

It has been revealed that lakes whose bedrock is made of granite (granitic bedrock) are seriously experiencing depletion of living organisms.

From the following answers, which is the primary reason for this depletion and why?

A.     Nuclear waste.

B.     Reducing water levels

C.      Acid rains

D.     Dumping of toxic wastes. 

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