Years after he barely survived a terrorist attack that killed his wife and two children, mr. puskari suffers recurring flashbacks and frequent nightmares of the event that render him incapable of holding a steady job. mr. puskari is most clearly showing signs of

Post Traumatic Stress Disorder (PTSD)

Explanation:

Post traumatic stress disorder is an anxiety disorder triggered by traumatic events, like the loss of a loved one, sexual assault, aggressive incidents. PTSD is characterized by the inability of a person to recover after experiencing or witnessing a terrifying event, individuals experiencing usually presents with symptoms like flashbacks or nightmares, anxiety, depressed mood.

because health skills are tools and strategies and also practical skills are also something you need to learn (like tools and strategies) and put it in reality.