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 ____________.
AWater cycle in the area got unbalanced
BElectronic wastes were being dumped in a nearby area
CA factory with heavy smoke discharge has been established nearby
DHeavy amount of chemical fertilisers were being used in a nearby field
Option d As heavy amount of chemicals fertilizers were being used in a nearby fiel
Ans 4:
Class : Class 4
A sudden increase in the number of algae is called a algal bloom. Algal blooms are usually caused by sewage water and other such things entering in a water body.