Concept: Marginal utility shows how the satisfaction received from a good changes with each additional unit consumed.Explanation: Utility is the satisfaction a consumer derives from using a product.Marginal utility is the change in total utility that results from consuming one more unit of a product.Because utility itself is a measure of satisfaction, marginal utility expresses the relationship between utility and satisfaction.It reveals the extra satisfaction obtained from the next unit of the product.Price, cost, and revenue are money-related concepts and do not define the relationship shown by marginal utility.Answer: B. Satisfaction