Which asbestos type is categorized as Amphibole and comprises less than 15% of asbestos found in buildings?

The correct answer is Amosite, which is categorized as an amphibole type of asbestos. Amphibole asbestos includes several different minerals characterized by their needle-like fibers, which can be more hazardous due to their shape and how easily they can become airborne. Amosite, also known as brown asbestos, was commonly used in insulation and other building materials until its ban due to health risks associated with asbestos exposure.

The reason Amosite comprises less than 15% of asbestos found in buildings is primarily due to its lesser prevalence compared to chrysotile, which is the most common form of asbestos and belongs to the serpentine group. Chrysotile accounts for the majority of asbestos found in structures, whereas amphibole types, including Amosite and Crocidolite, are less frequently encountered. This context helps reinforce why Amosite is recognized as a significant but less dominant asbestos type in building materials.