What type of yarn is known for its rough texture and resistance to pilling?

Texturized yarn is known for its rough texture and its ability to resist pilling. This type of yarn is often created by twisting or crimping fibers, which not only gives it a unique feel but also enhances its durability. The rougher surface can help reduce the likelihood of pilling, making it a practical choice for garments and other textile products that need to withstand wear and tear.

Wool yarn, while it offers excellent properties such as warmth and breathability, is generally softer and can be more prone to pilling over time. Silk yarn is known for its smoothness and luxurious texture, but it does not have a rough texture and can also be susceptible to damage and pilling. Polyester yarn is more durable and can resist pilling to some extent, but it does not typically have the rough texture characteristic of texturized yarn. Thus, texturized yarn stands out for embodying both a rough texture and strong resistance to pilling, making it the correct answer in this context.