The basic unit of raw materials used in making yarns is called

Fibre is the basic raw material used to make yarn. These thin, hair-like strands come from plants (cotton, flax), animals (wool, silk), or synthetic sources.

Individual fibres are twisted together to form yarn. Then yarns are woven or knitted to create fabric. Fibre is the starting point of textile production.

Fabric is the final product. Bias is a cutting angle. Lint is loose fibre waste. Only fibre is the basic building unit of yarn.