From the passage, you can determine that Native Americans used the American buffalo for _________ .

The passage does not directly state that the Native Americans consumed the American buffalo, but it does state that the Native Americans were able to use every part of the buffalo and that they did not waste any of it; therefore, you can determine that the buffalo\u2019s carcass was used by the Native Americans. For the American buffalo to plow, pull, or guard, it would need to be alive; therefore, you can eliminate those options as possible answers.