What characteristic defines a compound bow as compared to traditional bows?

A compound bow is defined by its unique mechanism that utilizes a system of pulleys and cams, which are integral to its design. This system allows for a mechanical advantage, making it easier for the archer to hold the bow at full draw. The cams provide a "let-off" feature, meaning that after drawing the bowstring, the archer experiences reduced holding weight, which enhances stability and accuracy during the shot process.

Unlike traditional bows, which typically rely solely on the elasticity of the material to launch an arrow, compound bows incorporate these mechanical elements to improve performance. This technology enables a higher level of energy storage and can lead to faster arrow speeds, making compound bows popular for various types of archery, including hunting and target shooting.

The other options do not accurately characterize a compound bow. For example, many traditional bows can be made from various materials including wood, fiberglass, and carbon, and they often come without the advanced mechanics that define compound bows. Additionally, traditional bows can have multiple strings or a simple string system, while maintenance is still required for any bow type to ensure optimal performance.