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Question

How does air trapped by the woolen fabric help ?

A
Air is a good conductor of heat and allows warm air to come near body
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B
Air is a bad conductor of heat and allows body heat to escape into atmosphere
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C
Air is a bad conductor of heat and doesn't allow body heat to escape into atmosphere
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D
Air is a good conductor of heat and doesn't allow cool air to come near body.
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Solution

The correct option is C Air is a bad conductor of heat and doesn't allow body heat to escape into atmosphere
Air trapped by the woolen fabric help us during winter. As air is bad conductor of heat and doesn't allow body heat to escape into atmosphere. The heat stored inside the body does not goes out as wool and air acts as a layer of insulator. And body heat is not escaped from the body.

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