Which of the following is not an example of fibre?
Wood
Fibre is a very thin, thread-like strand from which cloth is made. Fibres are often used in the manufacture of other materials. The strongest engineering materials often incorporate fibres, for example, carbon fibre and ultra-high-molecular-weight fibre i.e., polyethylene. Wood is not a fibre. Rayon and Nylon are man-made fibres used in clothing. Silk is a natural fibre which is obtained from silkworms.