Human engineering is also referred to as ------------------a.Human-digital interfaceb.Man-machine interfacec.Ergonomicsd.Mechanization process

The correct answer is b. Man-machine interface.

Human engineering, often used interchangeably with the term ergonomics, focuses on the interaction between humans and machines. This encompasses improving the design of systems, tools, and workspaces to enhance user performance, comfort, and safety. The "man-machine interface" specifically refers to how a human interacts with a machine, which is a central aspect of human engineering. Ergonomics (option c) is closely related, but in this context, “man-machine interface” is a more precise term to describe human engineering’s focus on optimizing interaction with technology.