Which change characterized one difference between the first and the second Industrial Revolutions?

Electricity replaced steam power in homes and businesses.
Farm enclosures made more people available to work in industry.
Steel production made it faster and easier to lay railroads.
Machines began to take the place of workers.

Machines began to take the place of workers.

The change that characterized one difference between the first and the second Industrial Revolutions was that machines began to take the place of workers.