In the Arctic region, hemispherical houses called Igloos are made of ice. It is possible to maintain a temperature inside an Igloo as high as $20^{\circ} C$ because
KVPY 2012, Medium
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(b)
Ice is a bad conductor of heat, its thermal conductivity is very low. So, no exchange of heat from outside surrounding occurs in an Igloo. Thermal conductivity of ice is $16 \,Wm ^{-1} K ^{-1}$.
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