Step 1: Understanding the Concept:
The question asks for the scientific discipline that studies the interaction between humans and other elements of a system, particularly in the work environment.
Step 2: Detailed Explanation:
(1) Agronomics: The science and technology of producing and using plants for food, fuel, fiber, and land reclamation.
(2) Economics: The social science that studies the production, distribution, and consumption of goods and services.
(3) Ergonomics (or Human Factors): This is the scientific discipline concerned with the understanding of interactions among humans and other elements of a system. It applies theory, principles, data, and methods to design in order to optimize human well-being and overall system performance. The description in the question—the relationship between man, machinery, equipment, and the work environment—is the exact definition of ergonomics.
(4) Mechanical Science: A branch of physics and engineering that deals with machinery and mechanics.
Step 3: Final Answer:
The science described is Ergonomics.