Eutrophication can be observed in

Thermal pollution of water bodies is due to

Select the correct option regarding algal bloom.
$I-$ Excessive growth of planktonic algae occurs due to the presence of high amounts of nutrients in water bodies.
$II-$ Algal bloom imparts a distinct color to the water bodies.
$III-$ Algal bloom causes deterioration of water quality and fish mortality.
$IV-$ All bloom-forming algae are highly toxic to humans and animals.

In water bodies,fish die due to eutrophication because of the lack of which of the following?

The term 'bio-magnification' refers to the

Blue-baby syndrome is caused by: