Commercial carpet and outdoor carpet have fibers made from:

The correct choice identifies polypropylene as the fiber commonly used for commercial carpet and outdoor carpet applications. Polypropylene, also known as olefin, is favored in these types of carpets due to its durability, resistance to moisture, and ability to withstand outdoor conditions. Its hydrophobic nature makes it less susceptible to mold and mildew growth, making it particularly suitable for environments exposed to weather elements.

Additionally, polypropylene offers a cost-effective solution for carpet manufacturing, which is particularly beneficial for large-scale commercial installations where budget considerations are crucial. It also holds up well against fading from sunlight, an important factor for outdoor carpets.

In contrast, while wool, nylon, and polyester are valuable fibers used in various carpet types, their properties do not align as closely with the needs for commercial and outdoor carpeting. Wool offers natural warmth and aesthetic appeal but is not as durable or resistant to weather as polypropylene. Nylon is known for its strength and resilience but tends to absorb moisture more, which can be a disadvantage in outdoor settings. Polyester, while soft and available in a variety of colors, may also struggle with the harsh conditions and potential moisture exposure that outdoor carpets face. Thus, polypropylene emerges as the most appropriate choice for these specific applications.