Final answer:
Force Quit allows users to end a non-responsive application on iMac's OS X without restarting the entire system, which is true.
Step-by-step explanation:
The Force Quit command can indeed stop one application without needing to restart the entire OS X operating system on an iMac. This statement is true. Force Quit is a feature that allows users to end tasks which are not responding or cannot be closed normally. It provides a way to exit out of problematic applications without affecting the stability of the overall system. This can be particularly useful when an application freezes or stalls, as it prevents the need for a full system reboot, thus saving time and preserving the state of other running application