Question

Coral bleaching is caused by

- warmer waters
- decrease in food
- ocean acidification
- cold temperatures

Answer 1

warmer waters

Step-by-step explanation:

The leading cause of coral bleaching is climate change. A warming planet means a warming ocean, and a change in water temperature—as little as 2 degrees Fahrenheit—can cause coral to drive out algae. Coral may bleach for other reasons, like extremely low tides, pollution, or too much sunlight.