The anwer is a because u can clearly see the rest are effect of he spanish colonies
oil spills non native species
Answer:
Abolition)
People that were freed from the slave trade started to speak up about their experiences, write books about the things that happened and just overall let people know the brutality of it all. People like William Wilberforce and Frederick Douglass were also big parts of the slave trade abolition.
The actual slave trade)
As the word about the slave trade went around, more and more people were being bought as slaves. Typically people if colour, and people that were all-round poor and couldn't afford a better lifestyle. Some people were born into slavery because their parents were slaves or their parents had debts to pay.
