Natural fibres are materials produced by plants or animals that can be spun into a thread, rope or filament. Which option describes natural fibres?

• A. Synthetic fibres made from man-made materials.
• B. Materials produced by plants or animals that can be spun into a thread, rope or filament.
• C. Fibres that cannot be spun.
• D. Metals combined with carbon.

Answer: (B)

Natural fibres come from living sources such as plants or animals, and they have enough length and flexibility to be drawn out and spun into yarns, threads, or filaments. That description fits because it mentions both their origin (plants or animals) and their ability to be spun into usable forms like thread or rope. Classic examples are cotton and flax from plants, and wool or silk from animals, which can be carded, combed, and twisted to create thread or yarn.

The other ideas don’t fit because synthetic fibres are manufactured from man-made polymers, not from natural plant or animal sources. Fibres that cannot be spun would not produce thread or rope. Metals bound with carbon describe carbon fibres or metal composites, which aren’t natural fibres derived from plants or animals.