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

• A. Direct Lighting
• B. Embossed
• C. Fiberglass
• D. Doeskin

Answer: (C)

The concept here is recognizing a fiber-reinforced composite. Fiberglass is made of extremely fine glass filaments (fibers) embedded in a resin binder. The glass fibers provide high strength and stiffness, while the resin holds them together and transfers stress, producing a lightweight, strong material used for reinforcement in many products. That description—very fine glass filaments set in a resin matrix—precisely defines fiberglass. By contrast, direct lighting refers to a light fixture, embossed describes a surface texture, and doeskin is a leather-like material.