Which material, when rolled into sheets, is known as wrought bronze?

Wrought bronze is a term used to describe bronze that has been mechanically worked or shaped, often into sheets or other forms. The key characteristic of wrought bronze is that it has undergone processes such as rolling or forging, which enhance its strength and ductility compared to cast bronze.

Bronze itself is an alloy primarily composed of copper and tin, and when it is rolled into sheets, it retains the properties that make it desirable for various applications including jewelry, decorative arts, and even some structural uses. The process of rolling the bronze into sheets allows for the creation of thin and flexible materials that can be easily shaped without breaking.

The other materials listed, such as iron, steel, and aluminum, do not accurately fit the definition of wrought bronze. Iron and steel, for instance, are primarily alloys of iron and carbon, rather than copper-based alloys, while aluminum is a different metal entirely. Therefore, bronze is the only appropriate answer in this context, as it specifically refers to the alloy that can be transformed into sheet form and classified as wrought bronze.