Depreciation, defined as loss of value from any cause, is generally divided into three classes. the loss of value due to wear and tear and action of the elements is called:

This is called Physical deterioration.

Explanation:

Physical Deterioration is the loss in value from all causes of age and action of elements.  It is caused by number of sources wear and tear , disintegration and decay.

answer; i believe that the correct answer is ( rivers);

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