What is a characteristic of wrought iron?

Wrought iron is characterized by its physical properties and how it is processed. It is primarily known for its excellent corrosion resistance, which makes it suitable for outdoor applications and environments where it might come into contact with moisture or corrosive elements. This attribute comes from its low carbon content and the presence of slag inclusions that provide a barrier against rust formation.

Wrought iron typically consists of just a small amount of carbon (around 0.1% or less), which differentiates it from other iron alloys that contain higher carbon percentages. Its resistance to corrosion is not as high as that of some stainless steels but is much better than that of cast iron.

The other options do not accurately depict wrought iron; it does not have a high percentage of carbon, it is not a non-ferrous metal (as it is primarily made from iron), and while it has good malleability, it is not stronger than steel, which generally has higher tensile strength due to its carbon content and alloying elements.