Answer: Due to the invention of the cotton gin, enslavement grew larger and more profitable than ever before in the nation’s history. Slavery was a practice the the south wanted to protect, while the North wanted to abolish it, and both sides took risks to get what they wanted. This disagreement eventually led to the civil war.
The underground rail road was a safe route that escaped slaves would take in order to get to the North. Along the underground railroad, there were safehouses -- homes that would let the escapees stay stay the night, and supply them with food, shoes, or medical attention if possible. The people who lived in these safe houses were known as conductors, and if anyone was found harboring a slave, the penalty was usually death. One of the most famous conductors of the underground railroad was Harriet Tubman.
I'm not sure about the last one, but I know that at least two of them wrote about their experience in slavery, which helped to expose the cruelty of the practice to the Americans who had not been exposed to it, which helped to spark the strong desire in the North to end slavery.
Step-by-step explanation:
I hope this helps! Happy almost Easter!