Question

what causes coral bleaching?
a water acidity causes coral polyps to lose their photosynthetic abilities, causin them to turn white in color
b high water temperatures and water acidity cause coral polyps to expel algae, causing them to turn white in color
c water acidity and high water temperatures make coral polyps more prone to infection, causing them to turn white in color
d high water temperatures boil coral polyps, causing them to turn white in color

Answers

GPT-4o mini
The correct answer is:

**b** high water temperatures and water acidity cause coral polyps to expel algae, causing them to turn white in color.

Coral bleaching occurs when corals experience stress due to factors like high water temperatures and increased water acidity, leading them to expel the symbiotic algae (zooxanthellae) that live within their tissues. This loss of algae deprives the corals of color and vital nutrients, resulting in the white appearance known as bleaching.

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