Answer:
B. Europe
Explanation:
On the graph, you can see that after 1870-1919, Europe's immigration basically goes downhill. In that case, Europe received a very major decline in immigration, making it the right answer. Apologies if I'm wrong.
The answer is the Aztecs(C)
Answer:
Domestication
Explanation:
Domestication has always been very useful to people. It is a way to tame animals so then after you could use it to benefit you. Either for farm work or even food. This is very common now a days.
For example. Cows are domestic animals. They live on farms, work in the fields, give us milk, cheese, butter and eventually meat for us to eat.
I don't know if I understood the question good, because its not clear, but I Hope this Helps!
:)