What is a common feature of handmade rugs?

Handmade rugs are often flat woven, and this characteristic is primarily attributed to traditional weaving techniques. Flat woven rugs do not have a pile, which differentiates them from many other types of rugs that feature height, texture, and more complex tufting methods. The absence of pile in flat woven rugs can offer distinct aesthetic qualities, making them suitable for various interior applications. These rugs can present intricate designs and patterns, and their flat nature allows them to be versatile in placement on floors or walls, enhancing the overall decor of a space.

In contrast, the other options do not align with the nature of handmade rugs. Handmade rugs are not machine-made, as that would contradict the definition of being 'handmade.' While they can utilize synthetic fibers, it is not a defining feature since many handmade rugs prominently feature natural fibers such as wool or cotton. Lastly, the notion that handmade rugs cannot be bound and used as area rugs is inaccurate; handmade rugs can indeed be bound and utilized as area rugs in various settings.