Question

what system protects workers from unexpected releases of various energy sources while they work with machines and equipment?
lockout/tagout
disconnect
barricade
energy - neutral

Explanation:

Lockout/tagout is a safety - related procedure that prevents the unexpected release of energy by locking and tagging equipment to ensure it cannot be started up or energized while workers are performing maintenance or servicing. Disconnecting may not fully prevent energy release in all cases, barricade is more for physical separation and not directly related to energy control, and energy - neutral is not a standard term for this type of protection.

Answer:

A. lockout/tagout