Final answer:
A Speech Pathologist would be the most beneficial referral for a 2-year-old child with difficulties in expressive language following a perinatal ischemic stroke, due to their specialized skills in treating communication disorders.
Step-by-step explanation:
The inter professional team member who would be most beneficial for a COTA to refer a 2-year-old child who had a perinatal ischemic stroke and has difficulties with expressive language is a Speech Pathologist. A Speech Pathologist specializes in treating communication disorders, which includes difficulties with expressive language. They are equipped to assess, diagnose, and provide therapy for speech, language, and swallowing disorders in children and adults. On the other hand, while an Early childhood educator can support overall development and a Pediatric audiologist focuses on hearing issues, the specific issue of expressive language difficulties as a result of a stroke would best be addressed by the expertise of a Speech Pathologist.