Read the following statements.
(a) Presence of large amounts of nutrients in waters causes excessive growth of them.
(b) They impart a distinct colour to the water bodies.
(c) They cause deterioration of the water quality and fish mortality.
(d) Some of them are extremely toxic to human beings and animals.
The above statements are related to

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Denitrifying bacteria

Fungal propagation

Lichens

Algal blooms

answer is C.

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Detailed Solution

Presence of large amounts of nutrients in waters also causes excessive growth of planktonic (free-floating) algae, called an algal bloom which imparts a distinct colour to the water bodies. Algal blooms cause deterioration of the water quality and fish mortality. Some bloom-forming algae are extremely toxic to human beings and animals.

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