Read the passage: A coral reef is a large underwater structure made of living and dead corals. These reefs form in tropical seas between 30° north and south of the equator, where they shelter many fish and other animals. Most present-day reefs grew after the last ice age, when rising seas flooded the continental shelves and coral communities built reefs upward as the water rose. Because corals need warm, sunlit water, they grow near the surface, which makes them vulnerable to human activity. Pollution from boats and coastal building clouds the water and cuts sunlight; toxic substances can bleach and kill corals. Many countries now restrict construction near reefs and regulate shipping to protect them. It can be inferred from the passage that coral bleaching is caused mainly by
Apollution and toxic substances in the water
Brising sea levels
Cthe last ice age
Dcollisions with ships
Answer & Solution
Correct answer: A. pollution and toxic substances in the water
The passage links bleaching to 'toxic substances' and pollution that clouds water — an inference that water quality, not sea level or ice age, drives bleaching.
Related questions
Read the passage:
The water cycle describes the continuous movement of water through EartRead the passage:
The water cycle describes the continuous movement of water through EartRead the passage:
The water cycle describes the continuous movement of water through EartRead the passage:
The water cycle describes the continuous movement of water through EartRead the passage:
A coral reef is a large underwater structure made of living and dead coRead the passage:
A coral reef is a large underwater structure made of living and dead coRead the passage:
A coral reef is a large underwater structure made of living and dead coIn the passage, the word 'SAVOURING' (as in 'savouring the freedom') means: