Final answer:
When unauthorized movement between restricted areas occurs, it is considered a security breach, which is a wide-ranging term for any unauthorized access that may lead to compromising security protocols.
Step-by-step explanation:
When someone goes from one restricted area to another restricted area without authorization, this sort of activity is typically referred to as a security breach. Such an incident involves gaining unauthorized access to resources or areas that are meant to be protected against such access. A security breach can lead to significant risks including the compromise of sensitive data, interruptions to operations, and it may necessitate immediate response protocols to counter the effects of the breach.
Although terms like Access Violation, Intrusion Incident, and Unauthorized Entry also describe similar scenarios of unauthorized access, the broad and encompassing nature of a security breach makes it the most fitting answer among the options.