Which command should be used to stop a designated service in Linux?

The command to stop a designated service in Linux is "service stop." This command specifically instructs the system's service management infrastructure to halt a running service gracefully. When executed, it sends the appropriate signals to the service process to terminate its execution and release any resources it may be using.

In the context of service management in Linux, the "service" command is widely recognized for managing system services (daemons) and can take various actions like start, stop, restart, and status. "Stop" is the correct action to use when the objective is to cease a specific service. It is important to use this command correctly to ensure services are managed effectively, which is crucial for system performance and stability.

Other choices listed do not correspond to valid commands for stopping services in Linux.