The correct answer is option 'A': Rayon.

Explanation:

Rayon is a semi-synthetic fiber that is commonly blended with wool to make carpets. It is produced from natural cellulose, which is usually derived from wood pulp or cotton. Rayon has properties that make it an ideal material for blending with wool in carpet production.

Here are some reasons why rayon is blended with wool for making carpets:

1. Softness and Comfort: Rayon fibers are soft and smooth, providing a luxurious feel to carpets. When blended with wool, it enhances the overall softness and comfort of the carpet, making it more pleasant to walk on or sit on.

2. Improved Durability: Rayon fibers are known for their strength and durability. By blending rayon with wool, the resulting carpet becomes more resistant to wear and tear, increasing its lifespan.

3. Moisture Absorption: Rayon has excellent moisture absorption properties, similar to wool. Blending rayon with wool helps to maintain the carpet's ability to absorb and release moisture, preventing the growth of mold and mildew.

4. Enhanced Appearance: Rayon has a natural sheen that adds a lustrous appearance to the carpet. When blended with wool, it enhances the visual appeal of the carpet, giving it a rich and vibrant look.

5. Cost-effectiveness: Rayon is relatively less expensive compared to wool. By blending rayon with wool, carpet manufacturers can reduce production costs while still maintaining the desirable properties of wool.

In conclusion, rayon is blended with wool for making carpets due to its softness, durability, moisture absorption, enhanced appearance, and cost-effectiveness. The combination of rayon and wool creates a high-quality carpet that is comfortable, long-lasting, and visually appealing.

Rayon is a regenerated fibre; i.e. the cellulose is broken down and then again reformed.