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Answer: Coral bleaching is mostly cause by temperature changes in water , light or nutrients. It cannot be caused by paraquat.

Explanation:

Coral bleaching occur when Coral expel symbiotic algae living in their tissues. Coral bleaching is caused when there is changes in temperature, light and nutrients requirement for Coral survival . These can lead to reduced reproductive capacity, reduced growth rate and increase mortality rates.

Coral bleaching is a phenomenon in which the coral loses its colour and texture. Coral bleaching results due to change in the water temperature, nutrients and light.

Paraquat does not cause coral bleaching instead it is caused due to changes in the water temperature and dissolved nutrient contents.

The reason for the answer is:

  • Coral needs appropriate temperature and nutrients for their survival, change in any of these qualities can cause coral bleaching.

  • Water pollution is a major reason for coral bleaching as it alters the quality of the water bodies.

  • Over fishing with the use of explosives and mild toxic substances is also the major issue for coral bleaching as coral dies because of these harmful substances.

  • Due to human activity, greenhouse gases emission has caused the global warming therefore, increasing the temperature and affecting the coral life.

Therefore, paraquat does not affect coral bleaching.

To learn more about coral bleaching follow the given link:

https://brainly.com/question/15014189

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