Which of the following materials is NOT typically considered a construction material?

The focus of this question is to identify materials that are commonly recognized as construction materials. Steel, aluminum, and stainless steel are all widely used in construction for various purposes, such as structural components, framing, and reinforcement due to their strength, durability, and versatility.

While glass is indeed used in construction, particularly in windows, facades, and other architectural applications, it is often categorized separately due to its fragility and specific applications compared to metals like steel and aluminum. Consequently, although glass is used in construction, it might not be as conventionally grouped with materials that are primarily associated with structural integrity and load-bearing capabilities. Therefore, it stands out as the least typical construction material among those listed.