Which component of the sling indicates if it has suffered too much damage to be used?

The correct answer is that warning yarns are the component of the sling designed to indicate if it has suffered too much damage to be used. These yarns are typically colored fibers incorporated into the sling's construction. When the sling is in use, if it becomes worn or frayed to an extent that compromises its integrity, these warning yarns will become exposed. This feature serves as a visual indicator, alerting the user that the sling should be removed from service and inspected or discarded. It provides an important safety measure, helping to prevent potential accidents due to equipment failure.

The other options serve different purposes in rigging practices. Inspection markers are generally used to identify the last date an item was inspected, while load indicators specifically show whether the sling has been overloaded. Safety tags typically contain important information about the equipment but do not directly indicate damage. Understanding the role of warning yarns can ensure safe rigging practices and enhance overall safety awareness on the job site.