Cork is used for insulation and acts as shock absorber because

It is porous

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It is very hard

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It is light and does not catch fire easily

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The cells of cork are living

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Solution

The correct option is A It is porous
Cork has various properties like it is light, gave low density, it is impermeable to both liquid and gases, it's great elasticity able to retain its shape and size. It is one of the best insulators as due to its porous structure it has low conductivity to sound, heat and vibrations and has a high tolerance to heat.
So the correct option is "It is porous".

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Tissue present below the skin epidermis which acts as a shock absorber and insulating layer is:

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