A farmer saw water in a pond turned green and with dead fishes.
a) What is the reason for the death of fishes?
b) Name the phenomenon that leads to the death of fishes.
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Answer:a)lack of oxygen as the oxygen supply from the atmosphere is cut because of the growth of green algae on the surface of water. The aquatic algae also act as a barrier for the sunlight to enter into the pond,so the marine plants do not get enough sunlight to do photosynthesis. Hence no food is made by the plants. The fishes get no food so they die
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