Synthetic ropes are primarily made from which materials?

Synthetic ropes are primarily made from a range of materials that provide durability, resistance to environmental factors, and strength. The correct materials include nylon, polyester, polypropylene, and polyethylene.

Nylon is known for its high tensile strength and elasticity, making it ideal for applications where stretch is advantageous. Polyester offers excellent resistance to UV light and abrasion, which contributes to the longevity of ropes made from it. Polypropylene is lightweight and floats in water, making it useful for marine applications. Polyethylene is highly resistant to chemicals and moisture, which adds to its versatility in various conditions.

The other options list materials that do not primarily fall under synthetic categories. Natural fibers, such as those found in option B, come from plants or animals and are not considered synthetic. Metal alloys and Kevlar listed in option C do support strong applications but are not the primary materials used for ropes in general contexts. Lastly, the materials in option D consist of natural fibers and textiles, again not aligning with the synthetic classification.