Examlex
A smile comes in many forms. Discuss the developmental progression of smiling with attention to the functions of different types of smiling.
Labor
The physical and mental effort used in the production of goods and services.
Marginal Product
The increase in output that arises from an additional unit of input.
Nonlabor Resources
Resources used in the production process that do not involve human labor, such as capital, land, and raw materials.
Worker
An individual who performs tasks or services for compensation, contributing labor to an economy.
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