why cotton wool and silk are natural fibre
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The vegetable, or cellulose-base, class includes such important fibres as cotton, flax, and jute. The animal, or protein-base, fibres include wool, mohair, and silk. ... Flax, hemp, jute, and ramie are bast fibres, occurring in the inner bast tissue of certain plant stems and made up of overlapping cells.
Fibres like wool and silk are obtained from animals. Cotton and jute are obtained from plants. Hence, they are natural fibres.
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The fibres which are obtained from natural sources like plants and animals are called natural fibres. Natural fibres are a collection of tiny threads obtained from plants and animals. For Example : cotton, wool ,Silk ,flax, jute.
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