Which material is composed of extremely fine filaments of glass embedded in resins?

• A. Direct Lighting
• B. Fiberglass
• C. Fixed Multiple
• D. Flat Finish

Answer: (B)

Fiberglass is a composite material made of extremely fine glass fibers embedded in a resin binder. The glass fibers provide high strength and stiffness, while the resin binds them together and hardens, creating a lightweight, durable material. In restorative art contexts, this combination gives a strong, workable material for prosthetic supports and forms. Other options described relate to lighting, an exam format term, or a surface finish, none of which match the description of glass filaments embedded in resin.