How is a building defined in terms of structure?

A building is defined primarily as a structure that provides shelter, support, and convenience for various activities. The correct choice indicates that a building can be a stand-alone structure or one that is separated from others by firewalls, which are crucial for fire protection and safety in construction. This aspect acknowledges the importance of structural integrity and compliance with building codes that dictate how buildings are designed to withstand hazards, including fire.

The definition allows for both independent buildings and those that are part of a larger complex but maintain safety measures, such as firewalls, which serve to compartmentalize the structure in the event of a fire. This characteristic is essential for safeguarding occupants and property.

The other options describe definitions that do not encompass the full scope of what a building represents. A temporary structure made of wood might not meet the criteria and permanence usually associated with a building. A refuge for animals does not clarify the concept related to human use or definable structural features of buildings. Lastly, a facility for industrial purposes only is too narrow, excluding other uses such as residential, commercial, or mixed-use buildings that are also integral to the definition of a building.