Answer :
It can be seen that Karl went through what is called Post-traumatic stress disorder (PTSD) whenever he sees a cat.
What is Post-traumatic stress disorder
Post-traumatic stress disorder also known as PTSD, is a type of mental disorder or health condition which is generated by a series of events that happened in the past that led a patient to be anxious.
Most of the times, the events are not controllable.
Learn more about Post-traumatic stress disorder here:
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