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Subject :NSO    Class : Class 8

On the basis of the given graph select the correct statement.

(A) X shows the amount of pollutants present in water.

(B) Y shows the population of fishes and other fresh water organisms.

(C) Y shows the amount of oxygen dissolved in water.

(D) Y shows the population of bacteria and algae.

Ans 1: (Master Answer)

Class : Class 1
The correct answer is D.

Ans 2:

Class : Class 8
X can be the harmful and toxic as they are released and again gain concentration,the quantity of aquatic animals decrease.Otherwise it was on an increase as the pollution was discharged.

Ans 3:

Class : Class 9

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