Final answer:
Yarn can be made from synthetic fibers like polyester and nylon or from natural materials such as cotton, wool, or silk. Synthetic fibers are used in various products and are stain-resistant. Natural fibers like cotton and silk have historical significance and are known for their durability and luxurious feel. Correct option is d)
Step-by-step explanation:
Yarn can be made of synthetic, such as polyester and nylon, or a natural blend using fibers like cotton, wool, or silk. Synthetic fibers, including polyester, are prevalent in a variety of applications, from clothing to industrial uses such as tire reinforcements and conveyor belts, due to their strength and stain resistance. These fibers do not require water for dyeing, unlike natural fibers such as cotton, which has been a durable fabric choice since 4500 BCE. Silk, known for its shimmer and luxurious feel, is produced from the cocoons of silkworms and has been a significant part of trade, notably along the Silk Road. Its production involves a silkworm consuming mulberry leaves and spinning a cocoon, which is then washed in hot water and unwound into silk thread. This versatile material can then be dyed a multitude of colors and woven into elegant fabrics.