Final answer:
A running process that encounters an unhandled error or exception and moves to the exit state undergoes Process Termination. This event concludes the process's execution due to an irrecoverable error.
Step-by-step explanation:
When a running process encounters an error or exception, if it cannot recover and must be stopped, this typically is referred to as Process Termination (A). Process termination happens when a process concludes its execution either normally or due to an error condition that cannot be handled during the execution. This contrasts with Process Abortion, where a process is killed externally by another process or the operating system for various reasons, such as deadlock or resource reclaim. Meanwhile, Process Exception is a condition that occurs during a process's execution which requires special handling, but does not necessarily terminate the process. Process Fault generally refers to an error in the process's code or operating environment, which may be handled or lead to process termination or abortion.