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The correct response identifies learned behaviors and physical/structural variables as significant factors that can influence orofacial myofunctional disorders.

Learned behaviors may include the patterns of oral muscle use that develop from habits such as thumb sucking, prolonged pacifier use, or mouth breathing. These behaviors can shape the way orofacial muscles function, potentially leading to disorders if the habits persist. Additionally, physical and structural variables encompass anatomical features such as the size and position of the tongue, shape of the jaw, and other craniofacial structures which can impact how these muscles work together. For instance, if an individual has a structural abnormality, this can have a direct influence on muscle function and oral motor skills.

Understanding these combined aspects is crucial for intervention and management in speech-language pathology, as addressing both learned behaviors and structural concerns can lead to more effective treatment and support for individuals with orofacial myofunctional disorders.