Answer :
The correct answer is:
D. a combination of two goods that can be produced using limited resources
Explanation:
- A production possibilities curve (PPC) represents the different combinations of two goods or services that can be produced by an economy given its limited resources.
- It shows the trade-off between producing one good over another due to scarcity of resources.
- The curve illustrates the concept of opportunity cost, where producing more of one good means producing less of another.
- Points along the curve are considered efficient as they fully utilize the available resources, while points inside the curve are inefficient, and points outside the curve are unattainable with the current resources.
- Changes in the curve can occur due to factors such as technological advancements, increased resources, or changes in efficiency.