1.

Which of the following statement is true regarding eutrophication?1). It doesn't affect the vegetation of an aquatic ecosystem.2). Excessive use of pesticides decreases nutrients in the aquatic ecosystem.3). It occurs in urban as well as rural areas.4). It doesn't affect health of people.

Answer»

Correct option - 3

On looking at the above mentioned passage, we observe that it is BASED on HARMFUL EFFECTS of water pollution. It is mentioned that sewage in urban areas LEADS to eutrophication. And, excessive use of fertilisers in rural areas leads to eutrophication. Thus, it occurs in both urban and rural areas. So, option 3 is the correct answer.



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