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Question

Why do we prefer wearing woollen clothes over cotton clothes in the winter season?

A
Wool is a poor conductor of heat​.
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B
Wool supplies heat to our body.
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C
Wool can trap air better than cotton.​
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D
Wool is cheaper than cotton.​
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Solution

The correct option is C Wool can trap air better than cotton.​
  • Wool is an insulator of heat. It prevents the flow of heat from the body into cold surroundings.
  • Air, which is also an insulator, gets trapped between its fibres.

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