What was the effect of improved metal-making processes developed during the industrial revolution

The effect of improved metal-making processes developed during the industrial revolution is that it made available cheaper, higher quality metals during the Industrial Revolution. This facilitated the Revolution given that metals were now available to enable the construction of factories and other infrastructure

the answer is a) to be able to obey them.

which time period is this? or is this story fictional, i'm going to need more info to answer this question