According to the IDEA, which of the following is one of the major disability categories?

Under the Individuals with Disabilities Education Act (IDEA), one of the major disability categories includes hearing impairment. This category encompasses a range of hearing losses, including those that affect a child's ability to process auditory information, which can impact their communication skills, academic performance, and social interactions.

Hearing impairment is specifically recognized in the context of special education, allowing children with such needs to receive the appropriate support and services to facilitate their learning in an inclusive environment. This category is critical as it recognizes not just profound deafness but also milder forms of hearing issues that can affect educational outcomes.

The other options, while they refer to specific conditions or disorders, do not fit within the major disability categories established by IDEA. Neurological impairment is a broader term that may not be categorized separately under IDEA, Down Syndrome is a genetic condition impacting development but is not classified as a major disability category per se, and generalized anxiety disorder usually falls under the broader category of emotional disturbances rather than being recognized as a separate disability category.