What advancement in the use of metal was achieved by the people of the They were the first civilization to mine iron ore.
They came up with methods to convert iron into steel.
They created methods to extract metal from ore.
They were the first civilization to work with bronze.

idk but found this on google

"the kansas-nebraska act allowed each territory to decide the issue of slavery on the basis of popular sovereignty. kansas with slavery would violate the missouri compromise, which had kept the union from falling apart for the last thirty-four years. the missouri compromise had prevented this from happening since 1820."

what organizations did you select

which sentences ? that question is incomplete

the use of electrical signals that transit messages is know as