When nuclear fusion ends in a high-mass star, the heavy elements formed in the star’s core are released through a

Before the civil war, the south’s economy was based on enslaved labor. large cities. immigrant workers. factories.

Why did jefferson make the louisiana purchase?

Which of these played the biggest role in increased urbanization in the late 1800s? a) transportation improved b) the military was stronger c) no one was farming anymore d) steam power was discovered