What is the characteristic of a carpet that primarily influences its durability?

The density of the pile is a crucial characteristic that significantly influences the durability of a carpet. A higher density means that more fibers are packed closely together, which translates to a sturdier surface that can withstand foot traffic and resist wear and tear over time. Carpets with dense piles tend to hold up better against crushing and flattening, which often occur in areas with heavy use.

While fiber content does play a role in durability, as some fibers are naturally more resilient than others, the overall density of the pile provides a structural integrity that contributes more directly to a carpet’s ability to perform well under various conditions. The other options, such as color and design pattern, primarily affect aesthetics rather than the performance and longevity of the carpet.