Concept:The basic economic problem is that human wants are endless, but the resources used to satisfy them are limited.
Explanation:People always desire more goods and services, even after satisfying current needs.
Once one want is fulfilled, another want appears.
So human wants are unlimited in nature.
However, the means or resources available to produce goods are limited and cannot meet all wants at once.
This scarcity of means makes it impossible to satisfy every desire completely.
Hence, wants remain insatiable because wants are unlimited while means are scarce.
Answer:D. unlimited while means are scarce