Arock layer is seen to spread horizontally and then get thinner and thinner at the edges until the rock layer disappears. this is known as the

That would be the law of original lateral continuity.

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The answer to this question is  c. pharmaceutical accumulation  reclaimed water refers to the water that being used again after it already  used for agricultural purposes.this type of water often contains pharmaceutical accumulation because of the chemical fertilizer that is used for the plants is absorbed into the water.