Answer:
The steam machine
Explanation:
James Watt, had no access to primary education, being educated initially by his parents, and at age 18, interested in studying and manufacturing instruments of measures, that's how he arrived in the steam machine. His name is, until today, honored by the international system of measures, in Watt measurement, which calculates the energy expended as a function of time.
Need more insight but from the 1800s it’s probably D because people in those times were very religious, and to have a education you were either a monk or a noble.
It generates heat by any mechanical activity mostly by a respiration which is by breaking the glucose
