Some animals have a thick coat of hair on their body. These hair give a material X which is used for making cardigans after suitable treatment. The material X traps a lot of Y which prevents the body heat of these animals from being lost into its surrounding. The material is removed from animals at the beginning of the season Z a) What are X,Y and Z
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i) X=is Wool, Y= is Air
ii) Z will be shearing
iii) Alpaca, yak, camel yields X(which is wool)
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