Which characteristic of metals allows for their use in construction materials?

The characteristic of metals that primarily allows for their use in construction materials is strength. Metals such as steel and iron are known for their high tensile strength, which means they can withstand significant loads without breaking or deforming. This strength is crucial in construction applications, as buildings and structures need materials that can support weight and resist various forces, such as wind and earthquakes.

In addition to strength, the durability and malleability of metals also contribute to their functionality in construction. They can be shaped into various forms and can withstand harsh weather conditions, further enhancing their suitability for long-lasting structural applications.

While low cost and flexibility might be attractive traits, they do not primarily define the reason metals are chosen for construction. Transparency is not a relevant characteristic for metals in this context, making it an unsuitable option. Overall, the exceptional strength of metals is what makes them indispensable in the field of construction.