Answer:
It refers to the PTSD diagnostic cluster of re-experiencing
Step-by-step explanation:
Posttraumatic stress disorder, PTSD, is a type of mental disorder that can be developed due to exposure to a traumatic event.
There are four diagnostic clusters of PTSD are avoidance, re-experiencing, arousal, negative cognitions and mood.
The diagnostic cluster of re-experiencing involves the spontaneous memories and recurrent dreams related to the traumatic event and prolonged or intense psychological distress or flashbacks of the event.