Answer:
D. Archimedes
Explanation:
Archimedes came up with the Archimedes Priciple, or physical law of buoyancy.
Because earthquakes can start shaking and set off a volcano or erupt it
Well, some Americans wanted to end slavery because they knew enslaving their own kind, the human race, was wrong. It didn't feel right to them, so they would rebel against it to end slavery.
Only photographs. There was little technology around, so photograph were really around at that point in time