Geothermal plateau. I'm only guessing, but since a lot of places use heat as energy it only makes sense.
The land was free and perfect for farming, if settlers survived the journey to Oregon the land was all theirs. But not only did the US like it, Britain and Russia also liked it. So the US told people to move there ASAP so it would officially be claimed by America.
First president of the republic of Hawaii and first governor of the territory of Hawaii
Answer:
It gave African Americans a voice in the new government.
Explanation: