Marginal utility is to consumer satisfaction as budget constraint is to which of the following?

Marginal utility refers to the extra satisfaction a consumer gets from consuming an additional unit of a good or service. Just like marginal utility helps us understand how much enjoyment someone gets from buying more of something, a budget constraint shows the limits of what a consumer can afford to buy. It represents the maximum amount of goods and services a person can purchase based on their income and prices. For example, if someone has $20 and each sandwich costs $5, their budget constraint allows them to buy a maximum of four sandwiches. Therefore, while marginal utility relates to satisfaction from consumption, the budget constraint relates to the limits of purchasing power.