A person is considered to have a disability if they have a condition that substantially impairs their ability to do what?

A person is considered to have a disability when a condition substantially impairs their ability to ambulate, which means to walk or move from one place to another. This definition is rooted in the understanding that mobility plays a crucial role in an individual's capacity to engage in daily activities and to interact within their environment. When someone struggles with ambulation, it can significantly affect their independence and overall quality of life.

While the other options are important functions, the term "ambulate" specifically encompasses the physical ability to walk, which is a fundamental aspect of mobility and independence. Impairments in this area can influence a person's ability to participate in various aspects of life, including work, social interactions, and general day-to-day activities. Therefore, ambulation is a key indicator when assessing whether a person has a disability.