Final answer:
The earliest anxiety disorder to emerge during childhood is Separation anxiety disorder.
Step-by-step explanation:
The earliest anxiety disorder to emerge during childhood is Separation anxiety disorder.
According to the text, anxiety disorders are feelings of worry and fearfulness that last for months at a time. Anxiety disorders in children include Obsessive Compulsive Disorder (OCD), Panic Disorders, Posttraumatic Stress Disorder (PTSD), and both Social and Specific Phobias. Among these disorders, Separation Anxiety Disorder is typically the first one to develop during childhood.