Choices: 1). exercise. 2). Reproducing. 3). solid, liquid, gas. 4). energy storage. 5). keeping the dog warm. 6). oxidation reaction. 7). an organism's body. 8). Plants growth.
Given those answer options, answer the question: Fact 1: Animals use saturated fatty acids to store energy. Fact 2: Animals store excess energy as fat. Given the two facts above, saturated fatty acids are used for:?
A:
4).