What does the serving on a bow string help protect?

The serving on a bow string is primarily intended to protect the string from wear. This is important because the repetitive motion of shooting arrows creates friction and stress on the string, particularly where the string makes contact with the arrow's nock. The serving is a protective layer that encircles the string, providing added durability and helping to prolong the life of the bow string. It minimizes the risk of fraying or breaking due to this wear, ensuring consistent performance over time.

While some options might seem relevant, they do not capture the primary purpose of the serving. For example, while it does indirectly benefit the arrow's nock by keeping the contact area smooth, this is not its main function. Similarly, it does not provide direct protection to the bow's limbs or the archer's fingers; instead, those components have different protective features and do not rely on the serving for their integrity.