B. Power provided by steam engines was the power commonly harnessed during the later phases of the industrial revolution.
Step-by-step explanation:
The Industrial Revolution was started in the year of 1760. During Industrial Revolution the production of goods were transited from small shops and homes to large factories. This led people to move from rural areas to big cities in order to work.
After Industrial Revolution, "Worker Safety Laws" were passed to ensure the working environment is safety for workers. Power provided by steam engines was the power commonly harnessed during the later phases of the industrial revolution.