Final answer:
Scarcity limits the availability of goods and services and gives something value.
Step-by-step explanation:
Scarcity, which means human wants for goods and services exceed the available supply, limits the availability of goods and services that people desire or need and gives something value. Supply is limited because resources are limited. Demand, however, is virtually unlimited. Whatever the supply, it seems human nature to want more. Therefore, the correct answer is 4) Scarcity.