Q. With reference to the ‘coral bleaching’ consider the following statements:
1.Extremely low tide is one of the reasons behind coral bleaching.
2.Bleaching of coral happens when coral expels zooxanthellae algae living in it.
3.Bleaching of coral has impact on human’s foods security and safety.
Which of the statements given above are correct?

[A] 1 and 2 only

[B] 2 and 3 only

[C] 1 and 3 only

[D] 1, 2 and 3

Answer: D
Notes:

Explanation –

Statement 1, 2 and 3 are correct. Extremely low tide is one of the reasons behind coral bleaching. Bleaching coral happens when coral expels zooxanthellae algae living in it due to which it turns white. Bleaching of coral has impact on human’s foods security and safety.

Source: The Hindu