What equipment is used to connect the lanyard to a stable anchor?

The correct choice is a carabiner, which is a versatile piece of equipment used to securely connect the lanyard to a stable anchor point. Carabiners are designed to handle heavy loads and have a locking mechanism that helps prevent accidental disengagement, making them suitable for safety applications in construction and climbing. Their strong, lightweight design allows for easy handling and quick attachment or detachment from anchors, which is crucial in maintaining safety and efficiency while working at heights.

While other options like shackles, hooks, and straps may be used in different contexts within rigging and safety applications, they do not offer the same ease of use or the specific locking mechanism that carabiners provide for connecting lanyards to anchors in a safe manner. Shackles are typically more cumbersome, while hooks may not have a locking feature, posing potential risks for safety. Straps can serve different purposes, but they are not as directly applicable for securing a lanyard to an anchor point as a carabiner is.