What type of elementary step is shown below? 
Definitions:
Drug Treatments
Therapeutic interventions involving the use of medications to treat diseases, alleviate symptoms, or modify psychological or behavioral conditions.
Panic Disorder
A psychiatric disorder characterized by unexpected and repeated episodes of acute fear accompanied by physical symptoms.
Biological Challenge Test
A procedure used to produce panic in participants or clients by having them exercise vigorously or perform some other potentially panic-inducing task in the presence of a researcher or therapist.
Hyperventilate
The condition of breathing at an abnormally rapid rate, leading to decreased levels of carbon dioxide in the blood.
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