It refers to the PTSD diagnostic cluster of <u>re-experiencing</u>
Explanation:
Posttraumatic stress disorder, PTSD, is a type of mental disorder that can be developed due to<u> exposure to a traumatic event</u>.
There are four diagnostic clusters of PTSD are avoidance, re-experiencing, arousal, negative cognitions and mood.
The diagnostic cluster of re-experiencing involves<u> the spontaneous memories and recurrent dreams related to the traumatic event and prolonged or intense psychological distress or flashbacks of the event.</u>
Soil can become waterlogged. The water can cut off the air supply to the roots and to the organisms that live in the soil. If the roots do not receive enough oxygen, the plants will die because they rely on oxygen to complete photosynthesis.