Rewrite completely in simple terms: In real-time operating systems, high-priority tasks may preempt resources from lower-priority tasks to meet critical deadlines. For example, if a high-priority task requires a resource currently held by a lower-priority task, the system may preempt the resource to ensure timely completion of the high-priority task. To prevent deadlocks, some systems allow preemption of resources. For instance, if a process is holding a resource and another process with higher priority needs it, the system may preempt the resource to avoid a deadlock situation. A real-time operating system managing a robotic assembly line, like if there was a low-priority task responsible for routine maintenance and a high-priority task responsible for emergency shutdown in case of a safety hazard. If the low-priority task is using a critical resource, like a control unit, and a safety hazard is detected, the high-priority task would need immediate access to the control unit to perform an emergency shutdown. For this, the system will preempt the control unit from the low priority and allocate it to the high priority ensuring the safety of the assembly line