Which economic concept is the closest to the saying, "There's no such thing as a free lunch"?

Question

Quizplus · Accepted Answer

The concept of opportunity costs is the closest to the saying "there's no such thing as a free lunch" because it means that for every decision or action taken, there is an opportunity cost or the potential loss of other options. In other words, nothing is truly free because everything has a cost, whether it is in terms of time, money, or resources.

Which Economic Concept Is the Closest to the Saying, "There's