Which term refers to the human effort—physical and mental—applied in production?

• A. Capital
• B. Land
• C. Labor
• D. Entrepreneurship

Answer: (C)

Human effort—the physical and mental work people contribute to turning inputs into outputs—is captured by labor. Labor covers both the manual tasks on the shop floor and the cognitive and creative contributions of workers, engineers, designers, and managers involved in production. Capital refers to man-made resources like machinery and buildings, land to natural resources, and entrepreneurship to the act of identifying opportunities and organizing resources. Since the question describes the effort people put into production, labor is the best match.