What is the function of a "sunday" in rigging?

The term "sunday" in rigging refers to a wire or rope sling that is commonly used to attach sandbags. This is an important aspect of rigging because sandbags are often utilized as counterweights to stabilize and support equipment or elements that are suspended in the air. By using a sling to securely connect the sandbag to the rigging system, it ensures that the weight is distributed appropriately, enhancing safety and preventing potential tipping or falling of the load. This type of application is critical in maintaining balance and security in theatrical environments, where precise rigging techniques are essential.

In contrast, the other choices represent different rigging components or devices that do not relate to the term "sunday." A lifting device for lighting fixtures is more closely associated with specific hardware used to suspend and raise lighting elements rather than the attachment of sandbags. A tool for tightening rigging lines pertains to tensioning methods and equipment rather than any particular sling or attachment. A type of safety net, while important for safety measures in rigging, does not specifically describe a sling or its function. Thus, B is the correct interpretation of what a "sunday" refers to in the context of rigging.