What are natural fibres? Differentiate between cellulosic fibres and protein fibres.
All the fibres obtained from nature, i.e., plants or animals, are known as natural fibres. e.g. cotton, wool, linen, silk, etc
Cellulosic Fibres: Fibres obtained from plant sources are called cellulosic fibres.
Protein Fibres: Fibres that come from animal sources are known as protein fibres. e.g., wool and silk.