Subject :NSO Class : Class 4
A scientist observed a sudden increase in the number of algae in a lake over a few days. The reason behind it could be that ____________.
A Water cycle in the area got unbalanced
B Electronic wastes were being dumped in a nearby area
C A factory with heavy smoke discharge has been established nearby
D Heavy amount of chemical fertilisers were being used in a nearby field
dddddddddddddddddddddddddddddddddddddddd is the ans
Ans 1:
Class : Class 4
Ans 2: (Master Answer)
Class : Class 1
Ans 3:
Class : Class 4
Ans 4:
Class : Class 8
D
Ans 5:
Class : Class 4
yess D
Ans 6:
Class : Class 4