Final answer:
The subject of this question is the law of diminishing marginal utility, which explains how the happiness or satisfaction one derives from consuming additional units of a good or service decreases as the quantity consumed increases.
Step-by-step explanation:
The subject of this question is the law of diminishing marginal utility.
The law of diminishing marginal utility is the principle that explains how the happiness or satisfaction one derives from consuming additional units of a good or service decreases as the quantity consumed increases. In this case, when you eat three ice cream cones, you enjoy the first one the most, the second one less, and the third one is tasteless.
This concept is important in Economics, as it helps explain consumer behavior and the demand for goods and services.