Identify which of the following items contributes to a building's fuel load.

A building's fuel load refers to the amount and type of combustible materials present that can contribute to a fire's intensity. Furnishings, such as upholstered chairs, carpets, and drapes, are made from materials that can easily ignite and burn, significantly impacting the fuel load of a structure. These items are designed for comfort and aesthetics but are often made with flammable materials that can quickly escalate a fire situation.

Wooden floors also contribute to the fuel load, as wood is a combustible material. However, wooden floors themselves are generally part of the building structure and are less considered in practical terms compared to loose furnishings, which can be more abundant and easily ignited.

Metal appliances, while they can be present in buildings, do not contribute to the fuel load since they do not burn or support combustion. Similarly, sprinkler systems are essential for fire protection and mitigation, but they do not contribute to the fuel load; instead, they help control and extinguish fires.

Therefore, the correct item that contributes significantly to a building's fuel load is furnishings, as they are typically more numerous and made of flammable materials compared to structural elements or fire suppression systems.