What is eutrophication?

Decrease in levels of oxygen in water bodies

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Increase in levels of oxygen in water bodies

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Reduction of nutrients in water bodies

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Increase in sunlight penetration

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Solution

The correct option is A Decrease in levels of oxygen in water bodies
The increased growth of algae in the water resulting in reduced sunlight penetration and depletion of dissolved oxygen in the water is called eutrophication. This is caused by presence of inorganic compounds in water rich in minerals and supports the growth of algae in river water.

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Similar questions

Q. Assertion (A): Thermal pollution is harmful to aquatic organisms.
Reason (R): Increase in temperature of water bodies reduces the dissolved oxygen level of the water.

What is the biological term for the process by which a water body becomes rich in dissolved nutrients, thereby stimulating the growth of aquatic life and ending in the depletion of dissolved oxygen in the water body?

Q. BOD or Biological Oxygen Demand is the level of oxygen needed in the water body for organisms to survive.

Q. During the process of eutrophication, the degradation of algal matter by bacteria causes an

increase

in oxygen levels in the water body.

Q. Which of the following reduces the dissolved oxygen level in water?

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