Respuesta :
The answer is the discovery of coal. Coal is used to power the machinery to produce products in a massive number. Machines during the Industrial Revolution thrive on coal energy to work. Coal was not only used in factories, but they were also used to power transportation, like trains.
Answer: Let me help you out the answer is:
New Technology
Explanation: the answer is right there when you read the first paragraph of the lesson let me show you:
CALVERT ACADEMY- The Industrial Revolution is marked by a change in production from making things one-at-a-time by hand to making hundreds of items at a time by machines. This shift was made possible by the development of new technology.
there is my evidence to back up my answer hope this helped I know I'm really late...