Question

[1]. Read the following passage carefully and answer the question.

Passage: Coral reefs are often called the rainforests of the sea because, although they cover less than one per cent of the ocean floor, they support about a quarter of all marine life. Tiny coral animals build hard skeletons of limestone, and over thousands of years these skeletons form reefs that shelter fish, turtles and countless small creatures. Reefs also protect coasts: they break the force of waves and reduce erosion during storms. But reefs are fragile. Rising sea temperatures cause bleaching, when corals expel the algae that feed them and give them colour. Pollution and careless fishing add further harm. Protecting reefs therefore means protecting both marine life and the coastal people who depend on fishing and tourism.

What is the main idea of the passage?

1.
A public library is a shared free space that preserves memory and builds critical judgement in readers.
2.
Careful observation of an unexpected result led to penicillin, later purified into a life-saving medicine.
3.
Coral reefs are fragile, biodiverse ecosystems that shelter marine life and protect coasts from waves.
4.
Map-making has always involved choices about what to show, so every map reflects the maker's priorities.
Answer (Detailed Solution Below)

Option 3 : Coral reefs are fragile, biodiverse ecosystems that shelter marine life and protect coasts from waves.

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Detailed Solution

सही उत्तर Coral reefs are fragile, biodiverse ecosystems that shelter marine life and protect coasts from waves. है।

Key Points

The passage centres on: Coral reefs are fragile, biodiverse ecosystems that shelter marine life and protect coasts from waves.

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Question:

[1]. Read the following passage carefully and answer the question.

Passage: Coral reefs are often called the rainforests of the sea because, although they cover less than one per cent of the ocean floor, they support about a quarter of all marine life. Tiny coral animals build hard skeletons of limestone, and over thousands of years these skeletons form reefs that shelter fish, turtles and countless small creatures. Reefs also protect coasts: they break the force of waves and reduce erosion during storms. But reefs are fragile. Rising sea temperatures cause bleaching, when corals expel the algae that feed them and give them colour. Pollution and careless fishing add further harm. Protecting reefs therefore means protecting both marine life and the coastal people who depend on fishing and tourism.

What is the main idea of the passage?

1.
A public library is a shared free space that preserves memory and builds critical judgement in readers.
2.
Careful observation of an unexpected result led to penicillin, later purified into a life-saving medicine.
3.
Coral reefs are fragile, biodiverse ecosystems that shelter marine life and protect coasts from waves.
4.
Map-making has always involved choices about what to show, so every map reflects the maker's priorities.

Correct Answer: Coral reefs are fragile, biodiverse ecosystems that shelter marine life and protect coasts from waves.

The passage centres on: Coral reefs are fragile, biodiverse ecosystems that shelter marine life and protect coasts from waves.

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