Q. Which among the following is/are correct about causes of Coral Bleaching?

1. Rise in Temperature
2. Ocean Acidification
3. Increased Sedimentation
4. Chemical Pollution

Select the correct code from the options given below:
Answer: 1, 2, 3 & 4
Notes: When corals face stress by changes in conditions such as temperature, light, or nutrients, they expel the symbiotic algae zooxanthellae living in their tissues, causing them to turn completely white. This phenomenon is called coral bleaching.
Causes of Coral Bleaching :
Rise in Temperature
Ocean Acidification
Increased Sedimentation
Chemical Pollution
Infectious diseases