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Question

A region of a lake is turned into a dead zone. Identify the correct reason.



Your Answer
A

Eutrophication

Your Answer
B

Acid rain

Your Answer
C

Washed off fertilizers in the lake

Correct Answer
D

Washed off fertilizers in the lake,acid rain and Eutrophication (all)


Solution

The correct option is D

Washed off fertilizers in the lake,acid rain and Eutrophication (all)


The people in towns and cities throw large quantities of garbage, untreated sewage, dead bodies, fertilizers and many other harmful things, directly into the river. Due to excessive nutrient pollution from human activities coupled with other factors, the oxygen required to support most marine life gets depleted. Such regions of a river are considered as "dead", as at many places the pollution levels are too high to support aquatic life. This phenomenon is called eutrophication.

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