What is one major life activity mentioned in the definition of disability?

The correct choice is significant as it aligns with the legal and educational definitions of disability, particularly those that refer to substantial limitations in major life activities. Breathing is a fundamental biological function essential for life and is explicitly recognized in legislation like the Americans with Disabilities Act (ADA) as a major life activity. This highlights how impairments affecting such core functions are recognized as disabilities.

In contrast, while options such as working effectively in a team, reading at grade level, and participating in sports may be important activities for many individuals, they do not represent the core biological functions typically encompassed in the definition of disability. These activities may indirectly reflect functional limitations but are not considered major life activities in the same context as breathing. Thus, recognizing breathing as a major life activity underscores the importance of supporting individuals whose disabilities affect essential life-sustaining functions.