Final answer:
Cashmere is the fiber produced from the undercoat of a goat's pelt, known for its luxurious softness and warmth.
Step-by-step explanation:
The fiber produced from the undercoat of a goat's pelt is known as cashmere. Wool, while a warm and durable textile, is typically derived from sheep, llamas, or yaks and is woven into clothing. On the other hand, cashmere is obtained from the soft undercoat of cashmere goats and is renowned for its luxurious softness, warmth, and lightweight texture. The process of collecting this fine wool involves combing out the underlayer of a goat's fleece, which is then washed and spun into yarn. Unlike the heavier and coarser outer coat, cashmere fibers are highly prized for making high-end garments.