Question

How are tides useful in cold countries?

• A. They bring fish for eating.
• B. They bring water for drinking.
• C. They don't allow sea water to be frozen.
• D. They keep the port silted.

Answer 1

The correct option is C They don't allow sea water to be frozen.

In cold countries, especially those located near the South Pole, sea water gets frozen into sheets of ice. This happens mainly in winter. The passage mentions: 'Tides do not allow the sea water to be frozen by keeping the sea water in motion'. This is how the tides are useful in cold countries. Hence, option C is correct.

The passage does not mention anything about the tides bringing in fish for eating or water for drinking. Hence, options A and B are incorrect.

Option D: It is true that tides keep the ports silted. However, this is common to all ports and not only for those located in cold countries. Hence, allowing the port to be silted does not benefit the cold countries in any particular way and option D is incorrect.