What was the difference between thomas newcomen's and james watt's steam engine? .

The steam engine of Thomas Newcomen and James Watt used the same principle of creating a vacuum  and using steam to drive the device. The difference is that in James Watt's version, he uses a separate condenser to allow for a much greater efficiency in terms of power. The main difference with a separate condenser is that with a separate condenser, the main device can remain hot at all times, thus increasing efficiency.

the answers is b.   environments.

i believe he was the 5th king of uruk. so c