Subject :NSO Class : Class 8
The overuse of fertilisers in a farm results in the runoff pollution of nearby river. Which of the following graphs correctly represents the resulting changes in the levels of oxygen and bacteria in that river?
A 
B 
C 
D 
Could someone pls explain?
Ans 1:
Class : Class 8
Answer should be D
Ans 2:
Class : Class 8
answer should be d
Ans 3:
Class : Class 8
Ans 4:
Class : Class 8
D
Ans 5:
Class : Class 8
The ans is not DEutrophication decreases oxygen and the graph shows increasing oxygen
Ans 6:
Class : Class 8
the answer should be D
Ans 7:
Class : Class 8
Ans 8:
Class : Class 8
Ans 9:
Class : Class 7
Shouldn't the answer be D?
Ans 10:
Class : Class 8
Ans 11:
Class : Class 9
This answer is WRONG!! Answer should be D.