A barebow is specifically characterized by its simplicity, which is evident in the absence of both a sight and stabilizer. This design choice emphasizes the archer's skill and instinctive shooting abilities, as they must rely solely on their own judgement and technique rather than external aids. Competing with a barebow allows archers to enjoy a more traditional shooting experience, where the focus is on their form and accuracy without technological enhancements.
The other options describe features that are not part of the barebow classification. Advanced sighting systems typically belong to compound bows or recurve bows that allow for precise aiming. A focus on indoor use does not apply, as barebows can be utilized in various shooting environments, including outdoor settings. Lastly, the mention of composite materials pertains to some modern bows, but it does not define a barebow specifically, as barebows can be made from a range of materials, including wood or traditional fiberglass.