Shells evolved from ribs. ... Turtles and other shelled creatures use shells like shields to protect themselves from predators, or animals that hunt them. Turtles probably needed a shield on their backs and stomachs because they faced predators in the ocean from both above and below.
Answer:
Native American removal would reduce conflict between the federal and state governments. It would allow white settlers to occupy more of the South and the West, presumably protecting from foreign invasion.
Explanation:
