B. He improved the steam engine, allowing it to be used in many
industries
Explanation:
The first steam engine was built in 1698, and by the time Watt was born, the machines, perfected by Thomas Newcomen, were already pumping water from mines throughout the country.
Sometime around 1764, Watt was given a model of the Newcomen machine to repair it.
Realizing that it was impossible to repair her, he began to work to improve it.
He added a separate condensation chamber that prevented excessive steam loss. He patented a new, improved model of a steam engine in 1769.
