Which of the following describes a pipefitter apprentice?

A pipefitter apprentice is a trained individual who is actively involved in practical piping construction while still receiving further education and experience in the field. This role typically includes a combination of classroom instruction and hands-on training under the supervision of more experienced professionals. The apprenticeship allows individuals to develop essential skills, learn safety protocols, and gain knowledge of piping systems, tools, and techniques necessary for the job.

In contrast to the other options, the apprentice is not someone without any training, as they have already begun their education in piping systems. They also differ from an unlicensed worker in the plumbing trade, as apprentices are usually recognized as part of a training program where they meet specific educational and work requirements. While they are not fully licensed to work independently, which distinguishes them from someone who has completed their training and earned full licensure, they are indeed trained individuals participating in the field.