Answer:
The technological changes included the following:
(1) the use of new basic materials, chiefly iron and steel.
(2) the use of new energy sources, including both fuels and motive power, such as coal, the steam engine, electricity, petroleum, and the internal-combustion engine.
(3) the invention of new machines, such as the spinning jenny and the power loom that permitted increased production with a smaller expenditure of human energy.
