Final answer:
The correct answer is d. scarcity. Scarcity is a characteristic of resources, including land. It refers to the limited availability of resources in relation to the unlimited wants and needs of people.
Step-by-step explanation:
The correct answer is d. scarcity. Scarcity is a characteristic of resources, including land. It refers to the limited availability of resources in relation to the unlimited wants and needs of people. While land is generally considered to be indestructible, unique, and immobile, it is not unlimited and therefore subject to scarcity.