The correct answer is: B. Polyamide polymer.
Nylon is a synthetic polyamide material made from long chains of linked amino acids. It is a strong, lightweight, and durable material that is used in a variety of applications, including clothing, textiles, ropes, and plastics.
Polyester is a synthetic fiber made from long chains of linked ester groups. It is a strong, lightweight, and durable material that is used in a variety of applications, including clothing, textiles, and carpets.
Polyvinyl is a synthetic polymer made from long chains of linked vinyl groups. It is a strong, lightweight, and durable material that is used in a variety of applications, including plastics, pipes, and insulation.
Polysaccharide is a complex carbohydrate made from long chains of linked sugar molecules. It is a major component of plant cell walls and is also found in animal tissues.
In conclusion, nylon threads are made of polyamide polymers. Polyamide polymers are strong, lightweight, and durable materials that are used in a variety of applications.