Answer:
Abraham Lincoln
Explanation:
Abraham Lincoln became the United States' 16th President in 1861, issuing the Emancipation Proclamation that declared forever free those slaves within the Confederacy in 1863.
The answer to the question above is water-powered machinery requires continuous running water for it to work. While steam-powered machinery requires water to produce steam, it is still different and advantageous compared to water-powered because it does not require continuous running water.
Increase in optimism, as it was very tough times
I would talk about Rockefeller for sure.
