Raul is a graduate student in biology. He has spent a lot of time studying the behavior of ground squirrels. When he places a large walnut and a small acorn side by side he notices that the ground squirrels will choose the walnut. He concludes that ground squirrels prefer the walnut. What type of reasoning is Raul using, and how do you know? Raul is using reasoning because he is using a observation to make a conclusion