SAT Central Ideas and Details Question

Animals use many objects as tools to achieve goals more easily. Such goals include grooming, finding food, and protecting themselves. For a long time, people thought tool use was unique to primates. Sea otters and other animals, though, have busted the myth that tool use is limited to certain primates. Inventively, sea otters use stationary anvil stones to break open mollusk shells. Woodpecker finches also get creative. They use cactus spines to pry insects from hiding places. Which choice best states the main idea of the text?