How do asbestos fibers behave when they are handled?

When handled, asbestos fibers exhibit a behavior where they can separate into microscopic-sized particles. This characteristic is critical to understanding the health risks associated with asbestos.

Asbestos is a group of minerals made of long, thin fibrous crystals, and when disturbed, such as through cutting, drilling, or other forms of handling, these fibers can break apart into even smaller particles that are easily airborne. These microscopic particles pose a significant inhalation risk, which can lead to serious health issues, including lung diseases and cancer. Therefore, recognizing that asbestos can create tiny, respirable particles when disturbed emphasizes the importance of proper handling, safety practices, and the need for protective measures during any work involving asbestos.

In contrast, the other choices suggest behaviors that do not align with the known physical properties of asbestos. It does not remain intact and solid or turn into liquid; neither does it increase in size, as this contradicts its fibrous nature and the effects of physical manipulation.