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Q.

Woolen cloths keep the body warm because     

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a

Wool increase the temperature of the body

b

Wool is a bad conductor of heat

c

Wool absorbs radiant heat from outer objects

d

Wool rejects heat from the outer objects

answer is B.

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Detailed Solution

Cotton clothes are thin and do not have space in which air can be trapped. Thus, cotton clothes do not prevent heat coming out of our body. Woolen clothes keep us warm during winter because wool is a poor conductor of heat and it has air trapped in between the fibres.

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