Who among the following fabrics metals as their primary trade?

The selection of Metal Fabricator (Fitter) as the answer is based on the specific role and responsibilities associated with that trade. Metal fabricators, often referred to as fitters, primarily engage in the creation and assembling of metal structures and components. This involves a variety of processes including cutting, shaping, and assembling metal parts to construct frameworks or machinery.

Metal Fabricators work with different types of metals, making it their primary focus and form of material. Their expertise lies not only in manipulating metals but also in understanding how different metals behave under various conditions, which is crucial for constructing durable and reliable products.

In contrast, while welders also work with metals, their primary function is to join metal parts together using various welding techniques. Parts Technicians focus on managing and repairing components rather than fabricating them from raw metals. Sheet Metal Workers specialize in fabricating and installing products made from thin sheets of metal, such as ducts and roofing, but their work is more specialized compared to the broader scope of Metal Fabricators. Therefore, the Metal Fabricator (Fitter) is the most appropriate choice in this context when referring to a trade that primarily involves working with metals.