Which characteristic defines a B2 major occupancy?

A B2 major occupancy is defined by the "treatment" of individuals who are being cared for due to various health-related issues. This classification is commonly associated with facilities such as hospitals or treatment centers where the primary function is to provide medical care and treatment to patients.

In the context of building codes, the major occupancy classification is important for establishing safety standards, fire regulations, and guidelines for construction that cater specifically to the needs of individuals receiving care. The architectural and safety measures applied to B2 buildings are tailored to ensure the welfare of occupants whose circumstances require medical attention.

The other options do not correctly capture the defining characteristic of B2 major occupancy. Detention relates to facilities where individuals are confined, care refers more broadly to the provision of shelter and support (as seen in care homes but not specifically for treatment), and assembly involves gatherings of people for various purposes, which doesn't align with the treatment focus of B2 occupancy. Thus, treatment is the hallmark of B2 major occupancy.