Correct Answer: Silk

Solution : The correct option is Silk .

Fibres are formed by the repetition of carbohydrates, or other substances. They are classified into two types- natural fibres, and artificial fibres. Natural fibres are those that are derived from plant, or animal tissues or geological processes. A few examples of natural fibres are animal fibres such as wool, silk, camel hair, and angora, and plant fibres are cotton, flax, hemp, and jute. Synthetic fibres are materials created by humans using chemical synthesis. A few examples are Nylon, Polyester, and Rayon.