Which question addresses opportunity costs in economics?

The concept of opportunity cost revolves around understanding the trade-offs involved in decision-making. When focusing on opportunity costs, individuals must consider what they are foregone by choosing one option over another. The correct answer captures this essential idea by directly addressing the concept of trade-offs, which signifies that in any decision, selecting one alternative means giving up others.

For instance, if a person decides to spend money on a new car instead of saving for college tuition, the opportunity cost is the potential education and future earnings lost due to that choice. In economic terms, every decision comes with a cost associated with the next best alternative that is not chosen, and trade-offs provide a clear lens through which to evaluate those costs.

The other options, while relevant to economic decision-making, focus on different aspects. They may discuss constraints, responses, or why certain choices aren't more widely adopted, but they do not directly encompass the essence of opportunity cost as effectively as focusing on the trade-offs does.