Which of the following is NOT illustrated by the production possibility curve

Step 1: Analyze the question We need the concept that the Production Possibility Curve (PPC) does NOT illustrate.

Step 2: Explain the concept The PPC (or production possibility frontier) shows the maximum combinations of two goods an economy can produce with its limited resources and a given level of technology. It illustrates:

• Scarcity: The economy cannot produce beyond the curve because resources are limited.
• Choice and opportunity cost: Moving along the curve means giving up some of one good to get more of another. The slope shows the opportunity cost.
• Efficiency: Points on the curve show efficient use of resources (productive and allocative efficiency). Points inside the curve show unemployment or inefficiency.
• Economic growth: An outward shift of the curve.

Step 3: Check each option

• A. Risk: The PPC deals with production possibilities and trade-offs, not with uncertainty or the probability of loss. It does not illustrate risk.
• B. Scarcity: Illustrated, because the frontier is a limit on output.
• C. Opportunity cost: Illustrated, because moving along the curve means sacrificing one good for another.
• D. Allocative efficiency: Generally taken as illustrated, since the curve shows how resources are allocated between goods. Strictly speaking, the PPC alone shows productive efficiency, and which point on the curve is allocatively efficient depends on society's preferences. Still, in JAMB's treatment, efficient resource use is associated with the PPC.

Step 4: Answer Risk is the concept the PPC does not illustrate.

Tip: Remember the PPC with the letters SCOUT: Scarcity, Choice, Opportunity cost, Unemployment/underuse (points inside), Technology/growth (shifts). Risk isn't on the list.