Final answer:
In the context of factors of production, 'land' refers to natural resources, making '4) Natural resources' the correct category associated with land.
Step-by-step explanation:
The factor of production in the category of land refers to natural resources that are used in the creation of goods and services. This includes any raw materials or the physical land itself that are essential for production. Examples would be minerals, forests, water, and agricultural land. Therefore, among the options given—labor, capital, entrepreneurship, and natural resources—the correct answer is natural resources.