Question

during the second industrial revolution, which building material became one of the most important in the world?
brick
wood
stone
steel

Explanation:

The Second Industrial Revolution saw the rise of steel - making processes like the Bessemer process and the open - hearth process. Steel was stronger, more durable, and more versatile than brick, wood, or stone for large - scale construction, leading to its widespread use in buildings, bridges, and other infrastructure.

Answer:

D. steel