What safety concern is generally associated with the use of fiberglass insulation?

The safety concern most commonly associated with the use of fiberglass insulation is skin irritation. Fiberglass insulation consists of tiny glass fibers that can become airborne during installation or handling. When these fibers come into contact with the skin, they can cause irritation, leading to rashes or discomfort. It is crucial for individuals working with or installing fiberglass insulation to wear proper protective gear, such as gloves and long-sleeved clothing, to minimize exposure and prevent skin irritation.

While other options relate to safety concerns, they do not specifically highlight the primary risk associated with fiberglass insulation. For instance, radiation exposure is not a concern with fiberglass, and it's not considered highly flammable under normal conditions, although proper precaution should always be taken. Weight distribution is typically not a safety concern directly tied to the use of fiberglass insulation in the context provided. Therefore, skin irritation stands out as the key safety issue when dealing with this material.