Which disadvantage is associated with wool?

Wool is known for its various favorable properties, but it does have some disadvantages, one of which is its tendency to bleach when exposed to sunlight. This occurs because the UV rays can break down the fibers and cause discoloration. Such degradation can affect the overall aesthetic of wool garments, especially if they are frequently worn in sunny environments or left exposed to sunlight for extended periods.

In contrast, the other statements don't accurately describe wool's characteristics. For example, wool does not fray easily as it is a stable fiber that holds its structure well. Additionally, wool is actually resistant to oils, making it less prone to staining and easier to clean than some other fibers. Lastly, while wool can be recycled, it is often biodegradable, which contradicts the idea of being non-recyclable. Understanding the nuances of wool's properties helps in making informed decisions regarding its use in fashion and textiles.