Chlorine bleach can negatively affect which of the following materials?

Chlorine bleach is a strong oxidizing agent that can cause significant damage to various fabrics. Wool, in particular, is a protein-based fiber that can be seriously weakened and discolored when exposed to chlorine bleach. The chemical reaction can lead to deterioration of the wool fibers, which not only results in fading of color but can also compromise the integrity of the fabric, leading to eventual holes or tears.

Silk, linen, and cotton are also natural fibers, but they have varying levels of resistance to bleach. While chlorine bleach can still damage these materials, wool is generally considered the most susceptible due to its unique protein structure. This characteristic of wool makes it critical to avoid using chlorine bleach as a cleaning agent on wool fabrics, making this the most appropriate choice for the question regarding which material is negatively affected by chlorine bleach.