The source of all economic problems arises from

Step 1: Analyze the question The question asks for the root cause of all economic problems. In other words, what is the basic reason economics exists as a subject?

Step 2: Explain the concept Human wants are unlimited, but the resources used to satisfy them (land, labour, capital, entrepreneurship) are limited. This gap between unlimited wants and limited resources is called scarcity. Because of scarcity, people, firms and governments must:

• Choose what to produce
• Decide how to produce it
• Decide for whom to produce it

These are the basic economic problems. Every one of them comes from scarcity.

Step 3: Evaluate each option

• A. Wants: Wants alone are not the problem. If resources were unlimited, we could satisfy every want and no economic problem would arise. Wants are one side of the equation, not the source.
• B. Scarcity: This is the root cause. Limited resources against unlimited wants force us to choose.
• C. Opportunity Cost: This is a consequence of scarcity. It is what you give up when you make a choice.
• D. Scale of Preference: This is a tool for handling scarcity. It is a ranking of wants in order of importance.

Step 4: Chain of reasoning Unlimited wants + limited resources → Scarcity → Choice → Scale of preference → Opportunity cost

Scarcity sits at the start of this chain, so it is the source.

Answer: B. Scarcity

Exam tip: Remember it as "Scarcity is the mother of all economic problems." If a question asks for the cause or source of economic problems, choose scarcity. If it asks about what is given up, choose opportunity cost. If it asks about ranking wants, choose scale of preference.