Question

there is no such thing as a free lunch is a famous economic expression that means everything has a cost. in 1 or 2 sentences, describe how this expression relates to opportunity cost.

Explanation:

The expression implies that when choosing something (like a "free" lunch), there are alternative uses of resources (time, money etc.) foregone, which is the concept of opportunity cost.

Answer:

The "free lunch" has an opportunity - cost in terms of the alternative uses of resources used to provide it or the alternatives given up by consuming it.