Which material might classify an area as a Class III location?

A Class III location is defined as an area in which flammable fibers or materials are present, which could pose a risk of ignition under certain conditions. Spanish moss is a natural material that can be highly flammable, especially when dry, and can easily ignite and spread flames.

When considering the characteristics of the other materials, plastic sheeting, fiberglass, and wood shavings don't typically qualify an area as Class III. Plastic sheeting is not flammable in the same manner as organic materials, while fiberglass is non-combustible. Wood shavings, while they can be flammable, are more commonly associated with Class II locations if they are not in a specific concentration or condition.

Therefore, Spanish moss is the material that aligns with the conditions defining a Class III location, making it the appropriate choice for this question. It highlights an understanding of how materials contribute to the classification of an area concerning fire safety regulations.