Answer: b.They could transport many materials or goods at once.
Explanation: Steam locomotive is one of the characteristics of the industrial revolution and an enormous increase in production. Thanks to steam locomotives, much larger quantities of goods, semi-finished goods, could have been delivered at once and more often than before. In this way, production has increased, more profits have been made, and due to the multiplicity of goods delivered at once, the costs of transport have been reduced, which is one of the basic postulates of the economy.
