Because of scarcity, every decision involves a trade‑off , also called an opportunity cost.

Core idea

  • Scarcity means resources (time, money, labor, materials) are limited while wants are virtually unlimited.
  • Because of that, choosing one option always means giving up something else; that “something else” is the opportunity cost.

In simple terms

  • Every time a person, business, or government chooses how to use scarce resources, it must sacrifice the next best alternative it could have chosen instead.
  • Economics focuses on this trade‑off structure of choices, not just on money, because the real cost of any decision is the value of what is given up.

TL;DR: Because of scarcity, every decision involves a trade‑off (opportunity cost), since choosing one option means giving up the next best alternative.