Which of the following is the reason for coral bleaching 1 Change in ocean temperature 2 Run o...........

Environment and Ecology Natural ecosystems and protection

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Which of the following is the reason for coral bleaching

(1)Change in ocean temperature

(2)Run off and pollution

(3)Overexposure to sunlight

(4)Extreme low and high tides

Choose the correct code

1,2 &3

2,3 & 4

1,3 & 4

1,2 & 4

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Explanation:

Bleaching occurs when abnormal environmental conditions, such as warmer sea temperatures, cause corals to expel tiny photosynthetic algae, draining them of their colour. The causes include change in ocean temperature, runoff pollution, overexposure to sunlight and extreme low tides.