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 3:
Class : Class 8
X can be the harmful and toxic wastes.so 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.