Question

why we need to choice opportunity cost​

Answer 1

Answer:

The fact that there is an opportunity cost to every transaction means that we all face trade-offs in the decisions we make. As a society, we cannot have everything we want and so to have more of one thing, we may have to have less of another.

Explanation:

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Answer 2

Since resources are limited, every time you make a choice about how to use them, you are also choosing to forego other options. Economists use the term opportunity cost to indicate what must be given up to obtain something that's desired.