Which challenge did James watts steam engine help address?

James Watt's steam engine helped address the challenge of inefficient power sources for machinery and transportation during the Industrial Revolution. By improving the design of earlier steam engines, he made them more efficient and capable of providing reliable, continuous power. This innovation facilitated the mechanization of various industries, significantly enhancing productivity and enabling the growth of factories and transportation networks. As a result, it played a crucial role in transforming economies and societies.