Which of the following is a natural carpet fiber?

Wool is recognized as a natural carpet fiber because it is derived from the fleece of sheep. This fiber has been used for centuries in various textile applications due to its inherent qualities, such as durability, resilience, and the ability to retain heat, making it a popular choice for carpets. Additionally, wool is naturally soil and stain resistant, which enhances its practicality for flooring applications.

In contrast, synthetic fibers, such as nylon and polyester, are man-made materials. While these synthetic options can provide durability and are available in a range of colors and textures, they do not possess the natural characteristics and benefits that wool does. Being sourced from organic materials gives wool unique properties that are valued in the carpet industry, confirming its classification as a natural fiber.