Final answer:
Nylon is recommended for ducklings and anchor lines due to its toughness, strength, and resistance to abrasion and chemicals.
Step-by-step explanation:
Nylon is recommended for ducklings and anchor lines because of its properties.
Nylon fibers are tough and possess high tensile strength, elasticity, and luster. They are resistant to abrasion and chemicals such as acids and alkalis.
Furthermore, nylon fibers can absorb up to 2.4% of water, which can be beneficial in certain applications.