Multiple choice

Woolens keep us warm in winter because they

  1. produce more warmth

  2. are good absorbers of heat

  3. do not allow our body heat to escape

  4. do not allow cool air to enter
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Woolen garments trap air within their fibers, and because air is a poor conductor of heat, it prevents body heat from escaping into the colder surroundings. This insulating layer is what keeps a person warm during winter.

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