According to the Law of ___ Utility, the additional satisfaction a consumer gains from consuming one more unit of a good decreases as the total consumption of that good increases.

Answer: Diminishing Marginal

This fundamental law explains why demand curves slope downward. As a person consumes more units of a specific commodity (like glasses of water on a hot day), the urgency and satisfaction derived from each successive unit fall, eventually reaching zero (satiety) or even becoming negative if overconsumption occurs.