SSC CGL (Prelims) General: Environment questions with solutions

Q1. Which factor poses a major threat to coral reefs worldwide?

1. Soil erosion
2. Ocean warming and acidification
3. Desertification
4. Urban housing

Answer: Ocean warming and acidification

Coral reefs are severely affected by rising ocean temperatures, which cause bleaching, and by ocean acidification, which weakens coral skeleton formation. These are major global threats to reef ecosystems.