Answer the following question: Fact 1: Mammals have a layer of fat under the skin to help insulate the body. Fact 2: Dietary fats are the fats found in foods. Given the two facts above, what do mammals have under their skin that is used to insulate the body?

Available choices: (1). food. (2). fur. (3). coats. (4). bread. (5). solid. (6). grains. (7). mice. (8). hair.
Answer:
(1).