Which of the following is a disadvantage of using steel in construction?

Using steel in construction does indeed require fire protection, which is a notable disadvantage. Steel has a high thermal conductivity and loses strength at elevated temperatures; therefore, it can fail structurally in a fire unless adequately protected. This necessitates additional measures, such as applying fire-resistive materials, which can increase both time and costs during the construction process.

The other choices, while they may highlight concerns associated with steel as a material, do not accurately represent significant disadvantages. For instance, steel is not inherently prone to warping, as it typically maintains its structural integrity under various conditions compared to materials like wood. Additionally, steel is widely used in both low-rise and high-rise construction, making it versatile rather than limited. Lastly, steel is known for its ductility, meaning it can deform under stress without breaking, which contributes to its strength in various applications. Thus, the requirement for fire protection is indeed a critical concern when using steel in construction.