during the second industrial revolution, which building material became one of the most important in the…

during the second industrial revolution, which building material became one of the most important in the world?\nbrick\nwood\nstone\nsteel
Answer
Brief Explanations:
During the Second - Industrial Revolution, advancements in steel - making processes like the Bessemer process and the open - hearth process made steel more affordable and widely available. Steel's strength, durability, and malleability made it ideal for large - scale construction projects such as skyscrapers, bridges, and railway infrastructure.
Answer:
steel