<span>Technological advancements in the production of iron, inventions in the area of machine tools and increased used of steam power gave birth to the modern factory where workers are no longer using hand tools but began using steam powered machine tools that lead to an increased productivity.</span>
The main thing is because Britain possessed the factories and other key factors of production. The agricultural and rural societies were transformed into urban and before the Industrial revolution the manufacturing was done in people's home and after that it was largely done in factories and the products were mass produced.
Only era can vary in length of time.Era means age,period which doesn't exactly define the time Century=100 years decade=10 years millennium = 1000 years,
