Answer :
The two main changes that the Industrial Revolution of the eighteenth and nineteenth centuries featured according to the Britannica Encyclopedia include:
" (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. "
" (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. "