Which trade is responsible for pouring, finishing, and polishing floors to reveal marble chips?

The correct choice is tied to the specific skills and processes involved in terrazzo work, which is a decorative flooring material made by embedding small pieces of stone, glass, or marble chips in a cement or epoxy matrix. Terrazzo workers are trained to pour this mixture, finish the surface for a smooth appearance, and polish it to expose the embedded chips, creating a visually appealing floor surface that highlights the materials used.

Other trades mentioned in the question each have distinct responsibilities. For instance, concrete finishers focus on applying finishes to cured concrete surfaces but do not specialize in the terrazzo process. Tile setters primarily install ceramic tiles, which is a different flooring method that does not involve the embedding and polishing techniques found in terrazzo work. Floor installers generally handle a variety of flooring types, including carpets and resilient flooring, but they do not perform the specialized work of exposing marble chips as terrazzo workers do.

This specialization in pouring, finishing, and polishing to reveal marble chips clearly distinguishes the terrazzo worker's unique role in the flooring industry.