Answer: animals migrate to other habitats to find food
Explanation:
Based on context clues you gave i'm assuming the answer would be C.
The treatment can generally be described as awful and degrading.
There are few things here to note. The US- Native American relation in the second half of the 19th century are plagued by conflict and numerous Native American uprisings. Some of the most notable conflicts are the Plains Indian War and Geronimo. The forceful relocation known as the Trail of Tears also occurred during this time period. The natives were also forced into boarding schools in the attempt to "integrate" them in the American society, which meant erasing the traits of their Native American identity.
The Chinese Communist Party was able to gain the support of the peasants through their offer of a revolutionary land reform. The peasants who paid taxes and provided food, labor and military services would be rewarded with land and other forms of riches seized from the elite of the nation.