Answer:
Explanation:
Mongol Empire expanded through brutal raids and invasions, but also established ... The empire unified the nomadic Mongol and Turkic tribes of historical Mongolia. ... Impact of the Pax Mongolica. The Pax Mongolica refers to the relative ...
I believe it is the second one.
It provided a source of power for many kinds of machines.
Answer:
William Crawford Gorgas, (born Oct. 3, 1854, Mobile, Ala., U.S.—died July 3, 1920, London, Eng.), U.S. Army surgeon who contributed greatly to the building of the Panama Canal by introducing mosquito control to prevent yellow fever and malaria.
Explanation:
