Which of the following is NOT considered a business or establishment affected by the ADA?

The Americans with Disabilities Act (ADA) is a civil rights law that prohibits discrimination based on disability, and it applies to various public and private entities. While public transportation services, public schools, and shopping malls are all considered businesses or establishments covered by the ADA, private residences do not fall under its jurisdiction.

Private residences are generally not required to comply with ADA standards because the act applies mainly to places of public accommodation or commercial facilities. Therefore, the reasoning for selecting private residences as the answer to the question is rooted in the fact that these settings do not provide services or facilities to the public in the same manner as the other listed options do. Public transportation, public schools, and shopping malls all serve the public and must adhere to ADA guidelines to ensure accessibility for people with disabilities.