The correct answer is: a) Sheep wool.
Namda is a type of felted rug made from sheep wool. It is a traditional craft of Kashmir, India. Namda rugs are made by felting wool fibers together using heat, moisture, and pressure. The wool is first carded to remove any impurities and then it is spun into yarn. The yarn is then dyed and then it is laid out on a flat surface. The wool is then felted together using a combination of heat, moisture, and pressure. The felting process can take several days to complete. Once the felting process is complete, the rug is trimmed and then it is finished with a border. Namda rugs are known for their durability and their warmth. They are often used as floor coverings in homes and offices.
Option b) Cotton is not a correct answer because namda rugs are made from sheep wool, not cotton.
Option c) Jute is not a correct answer because namda rugs are made from sheep wool, not jute.
Option d) Silk is not a correct answer because namda rugs are made from sheep wool, not silk.