What is commonly applied as a protective measure around a line to prevent wear?

Chafing gear is a protective measure that is specifically designed to safeguard lines or ropes from abrasion and wear, which can occur when they rub against other surfaces or objects on a vessel. This is particularly important in marine environments where lines are frequently in motion and subjected to harsh conditions. Chafing gear typically consists of materials such as fabric, leather, or synthetic materials that are durable and provide a buffer against friction.

The other options do serve various purposes in handling and maintaining lines but do not specifically address wear prevention as directly as chafing gear does. Whipping is used to prevent the ends of a rope from unraveling, ensuring the integrity of the line itself. A rope pack can be used for organization and storage purposes but does not inherently protect against abrasion. A canvas wrap serves a similar function to chafing gear but is less commonly referred to in this context. Thus, chafing gear is the most appropriate choice for the protection of lines from wear.