The structural system supports the materials of a building against which of the following?

The structural system of a building is designed to support various loads that can act upon it throughout its life cycle. This includes internal loads, wind forces, and gravity loads.

Internal loads consist of forces generated within the building, such as the weight of furnishings and occupants, and dynamic loads from activities occurring inside. Wind forces apply horizontal pressure against the structure, particularly relevant for tall buildings and those in exposed locations. Gravity loads encompass the weight of the structure itself, including all building materials and any live loads that are placed on it, like people and furniture.

Since the structural system must accommodate and distribute loads from multiple sources to maintain stability and ensure safety, it is indeed accurate to say that the correct answer encompasses all these factors. Each of these load types plays a critical role in the overall design and function of a building, making the choice that includes all variations the most comprehensive and correct response.