Identify the correct statements about Eutrophication
• [I.] It takes place in air
• [II.] It is due to excess oxygen in water
• [III.] It occurs in water
• [IV.] It leads to the destruction of aquatic life
The correct answer is
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Eutrophication:
\[
\text{Excess Nutrients}
\rightarrow
\text{Algal Bloom}
\rightarrow
\text{Oxygen Depletion}
\rightarrow
\text{Death of Aquatic Organisms}
\]
Remember: It is caused by nitrates and phosphates, not by excess oxygen.