Answer:
Islam
Explanation:
Islam was the first (1526-1857)
answer
Explanation:
The sun has heat, and the heat causes the snow to melt because of the sun's tempature.
I think the difference is caused by a person or group actually going through with genocide versus an attempt at it, but that's just my best guess?
I would have to go with Completion of the transcontinental railroad in 1869
