This answer is B , which is also correct on Plato.
I'm pretty sure it was the horse bc native americans no longer traveled on foot for long distances. instead, they had the ability to travel using horses which was faster and more efficient
Brunelleschi created perspective, it was important because it was never seen before and allowed artists to draw what their eyes could see
Generally speaking, it was the "slum dwellers" and the "immigrants" who did not share in the prosperity of the late 1800s in the United States, since they were the lower class workers.
I think the answer is noises and gestures for danger
