A load-operated jaw, rotating gate, or spring-loaded clip that closes off the opening of a hook.

• A. Link
• B. Latch
• C. Saddle
• D. Shackle

Answer: (B)

A latch is the spring-loaded piece that closes the opening of a hook. It acts like a small gate that covers the mouth of the hook, keeping the load from slipping out unless the latch is deliberately opened. This mechanism is essential in rigging to prevent accidental disengagement during lifts. A link is just a segment of chain or sling used to connect parts, a saddle is a support piece that cradles the load or sits under the hook, and a shackle is a separate U-shaped connector with a pin. So the device described—a load-operated jaw, rotating gate, or spring-loaded clip that closes off the hook opening—matches a latch.