Final answer:
The term to describe Eugenia's specialized task of repairing only icemakers is 'division of labor', a concept wherein different workers perform specific tasks to increase efficiency.
Step-by-step explanation:
Eugenia's work repairing only icemakers within her company, despite there being other machines that the company produces, is an example of division of labor. This term is used by sociologists to describe the specialization of work tasks, where the overall production process is broken down into a series of specialized tasks, each performed by a different worker or group of workers. Specialization allows workers to focus on the parts of the production process where they have an advantage due to their unique skills, talents, interests, and sometimes geographical location.