Steffan recently suffered a traumatic experience and is now seeing a therapist on a regular basis. his therapist waves her finger in front of steffan's eyes while he imagines the traumatic scene. this type of therapy is known as:

- Eye Movement Desensitization and Reprocessing (EMDR).

Explanation:

EMDR therapy is designated as the psychotherapy that primarily aims to relieve or reduce the torment and affliction(psychological stress) caused by the excruciating past memories. This psychotherapy is quite beneficial for patients suffering from trauma or patients willing to overcome post-traumatic stress disorder.

As per the question, the type of therapy that Steffan undergoes would be categorized as 'EMDR' as she attempts to overcome a 'traumatic experience' and her therapist assists to alleviate or relieve her post-traumatic stress by processing the memories that are associated with the trauma. Thus, 'EMDR' is the answer.

i would say b. research typically uses a variety of sources

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