When calculating yield, what relationship must be known?

The relationship between the amount utilized and the amount available is essential when calculating yield because yield essentially measures the efficiency of resource usage. In various contexts, such as agriculture or finance, yield is determined by comparing the output (amount utilized) to the input or resources available (amount available).

Understanding this relationship provides insight into how well resources are being converted into useful outputs. For instance, in agriculture, this could refer to the amount of crop harvested (utilized) compared to the land or seeds planted (available). In a financial context, it might involve evaluating how much profit is realized from the total assets at hand.

The other options focus on different financial relationships that, while important in their contexts, do not relate directly to the fundamental concept of yield, which is fundamentally about the effectiveness of input versus output.