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State PCS PYQPrelims 2024

UPPCS · Question 19

Which of the following reasons caused catastrophic coral bleaching and mass coral deaths in the Andaman and Nicobar Islands?

  1. Increased industrial activities in the coastal regions
  2. Increase of 2 degrees C temperature in the Indian Ocean
  3. Heavy marine pollution
  4. Decrease of temperature by 4 degrees C in the Indian Ocean
Show answer & explanation

Answer: (B) Increase of 2 degrees C temperature in the Indian Ocean

Explanation

The 2024 mass bleaching was caused by a marine heatwave that raised sea-surface temperatures about 2 degrees C above normal.