Except the following, all natural fibres are staple fibres :

Question

Accepted Answer

Silk is the correct answer because it is the only natural fibre among the options listed that is not a staple fibre. Here's a detailed explanation:

1. **Silk (Option 3)**: Silk is a natural fibre produced by silkworms. Unlike staple fibres, which are short and measured in inches or centimeters, silk is a filament fibre. Filament fibres are long and continuous, often measured in yards or meters. This characteristic of silk makes it unique among natural fibres, as it can be spun into very fine and smooth threads without the need for spinning short fibres together.

2. **Cotton Fibre (Option 1)**: Cotton is a staple fibre. It consists of short fibres that are spun together to create yarn. The length of cotton fibres can vary, but they are generally much shorter than filament fibres like silk. This makes cotton a classic example of a staple fibre.

3. **Jute (Option 2)**: Jute is also a staple fibre. It is composed of short, coarse fibres that are spun together to make yarn. Jute fibres are typically used in making burlap, hessian, and other coarse fabrics, and they are not continuous like silk.

4. **Linen (Option 4)**: Linen is derived from the flax plant and is another example of a staple fibre. The fibres are relatively short and are spun together to create linen yarn. Linen fibres are known for their strength and durability, but they are not continuous like silk.

In summary, silk is the only natural fibre among the options that is a filament fibre, while cotton, jute, and linen are all staple fibres. This distinction makes Option 3 (Silk) the correct answer.