I’ve read the hunger games
The difference between slavery and its more modern variety was manumission – the ability of slaves to be freed. However, the law gave any children born to freedmen, after formal manumission, full rights of citizenship, including the right to hold office. Informal manumission gave fewer rights.
Change is so fast, many of our larger animals simply don't have time to adapt. Scientists at Southampton University say a combination of poaching, habitat loss, pollution and climate change will cause more than 1,000 larger species of mammals and birds to become extinct over the next century.
Many thousands of years ago, not a single human being lived in the Americas.
This only changed during the last Ice Age. It was a time when most of North America was covered with a thick sheet of ice, which made the Americas difficult to inhabit.
But at some point during this time, adventurous humans started their journey into a new world.
They probably came on foot from Siberia across the Bering Land Bridge, which existed between Alaska and Eurasia from the end of the last Ice Age until about 10,000 years ago. The area is now submerged by water.
There is still debate about when these first Americans actually arrived and where they came from. But we are now getting closer to uncovering the original narrative, and finding out who these first Americans really were.
I am not to sure on this one but I believe that your answer is A China lost its favorable balance of trade as silver began to flow out of the country.