What category in the building code classification system groups buildings by their use and occupant characteristics?

The correct answer is the category that groups buildings based on their purpose and the types of occupants they serve, which is known as "Use group." This classification is essential in the building code as it helps determine the safety requirements, occupancy limits, and necessary life safety measures based on how the building will be utilized and who will be occupying it.

Buildings are categorized into different use groups, such as residential, commercial, industrial, and assembly, which directly impacts the design, construction, and operational protocols required to ensure safety and compliance with applicable codes. Understanding use groups allows architects, builders, and fire officers to create spaces that meet the specific needs and safety concerns associated with the intended use of the building.

The other categories, such as fire safety group and occupancy type, may overlap in some contexts but do not specifically address the broader purpose of categorizing buildings specifically according to the intended use and characteristics of occupants. Thus, while relevant, they do not capture the same comprehensive classification defined by the term "Use group."