Environment degradation does not consist of​

None of the above

Explanation:

The options include:

A. Land degradation and soil erosion

(B) Problem of overgrazing and ecological degradation

(C) Floods

(D) None of the above

Environmental degradation simply refers to the deterioration of the environment whcih occurs when there's depletion of the resources like soil, water and air, pollution and the the destruction of habitats and ecosystems.

It should be noted that environmental degradation consist of land degradation and soil erosion, problem of overgrazing and ecological degradation, floods etc.

Therefore, the correct option is None of the above.

the first successful, urban blues recording, selling more than 75,000 copies, was made in year 1920.

mamie smith recorded the first commercially successful example of the urban blues,   with the recording of “crazy blues”."crazy blues" was recorded on august 10, 1920, in new york city. within a month of the release of “crazy blues” it had sold 75,000 copies.