The toddler is at risk for developing hearing loss as evidenced by the toddler's bone biopsy results.

Choice A rationale Otitis media is a common ear infection characterized by inflammation of the middle ear. It is typically caused by bacterial or viral infections, not the presence of a foreign object, which would cause physical trauma or irritation. A foreign object would more likely cause pain, hearing impairment, or infection of the external auditory canal, a condition known as otitis externa. Choice B rationale A bone biopsy is a surgical procedure used to diagnose conditions related to bone tissue, such as osteosarcoma, osteomyelitis, or certain metabolic bone diseases. It involves extracting a sample of bone tissue for microscopic examination. It has no direct relationship to the auditory system or the diagnosis of hearing loss, which is a functional impairment of the ear's ability to process sound. Choice C rationale A cholesteatoma is an abnormal, noncancerous skin growth that can develop in the middle section of the ear behind the eardrum. It is often caused by chronic ear infections or eustachian tube dysfunction, leading to a retracted eardrum and the accumulation of skin cells. While ear trauma can sometimes contribute to ear pathologies, it is not a primary cause of cholesteatoma development. Choice D rationale An audiogram is a key diagnostic test used to objectively measure and quantify an individual's hearing abilities. It plots hearing thresholds at various frequencies, providing a detailed visual representation of the type, degree, and configuration of any hearing loss. This non-invasive test is the definitive method for diagnosing hearing impairment and is the gold standard for assessment.