Leadership, money, whats your choses.
Answer: c) Critically endangered species
Explanation:
Critically endangered species include individuals whose number has been reduced by more than 80% of the total population. Sometimes, the species is considered extinct, but extensive research often determines that it is critically endangered. Critically endangered species are actually on the verge of extinction. The red wolf, the South Chinese tiger, and the Siberian tiger are currently on that list with many other species.
American settlers continue to spread to the west and took land from Native Americans. As expansion continued, agreements were signed and they were broken with native americans losing their homes and land and force to move west. As Native Americans were forced to more to the west, they are not able to adopt to the environment they are moving to, so they died due to lack of food or diseases.