Answer:
answer is below
Explanation:
Slavery was the act of using African-American people to work in harsh conditions with little to no pay, these people did work such as cleaning, picking cotton fields, being assistants, and doing farm work. A few notable people that abolished slavery was Martin Luther King Jr., Fredrick Douglass, Harriet Tubman, John Brown, and some more. They did this through peaceful protests, escaping with inside jobs(people who would free them when there was no supervision), and escaping while doing work.
The bubonic plaque changed the social structure of Europe by this:
Before, the nobles and aristocrats were the 'body' that ran almost everything political. However, after the bubonic plague, this was shifted towards the common people. So the common people basically got more rights.
hope this helps :D
