The correct option is D Bones and tusks
All fabrics are made of fibres. The fibres obtained from plants and animals are called natural fibres.
∙ Wool is an animal fibre obtained from the fleece of animals like sheep, yak, goat, camel, etc.
∙ Silk, an animal fibre, is obtained from the cocoon of silkworm.
∙ Cotton and jute are plant fibres obtained from cotton and jute plants respectively.
However, bones and tusks cannot be used for obtaining fibres.