Which of the following activity will reduce the dissolved oxygen in the water and suffocate marine organisms?

Agriculture activity

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Industrial waste

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Thermal pollution

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Oil spilling

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Solution

The correct option is D
Oil spilling

Oil spills cause water pollution which is harmful to aquatic life. The oil which remains floating on the water surface blocks sunshine reduces the dissolved oxygen in the water and suffocates marine organisms.

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The farmers use large amounts of a substance P in the fields to increase the crop yield. The excess of P dissolves in water and runs into a lake. The substance P causes rapid growth of tiny green water plants Q in the lake which cover the whole lake like a green sheet. When the plants Q die, the organisms called R decompose them by utilizing S dissolved in lake water. The amount of dissolved S in water decreases too much due to which the fish living in lake suffocate and die. What are P, Q, R and S?

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Which of the following activity will reduce the dissolved oxygen in the water and suffocate marine organisms?

The correct option is D Oil spilling Oil spills cause water pollution which is harmful to aquatic life. The oil which remains floating on the water surface blocks sunshine reduces the dissolved oxygen in the water and suffocates marine organisms.

The correct option is D
Oil spilling

Oil spills cause water pollution which is harmful to aquatic life. The oil which remains floating on the water surface blocks sunshine reduces the dissolved oxygen in the water and suffocates marine organisms.