Final answer:
Fiber-optic cables have the advantage of being able to carry signals for longer distances compared to copper cables.
Step-by-step explanation:
An advantage of fiber-optic cable over copper cable is that it is able to carry signals for longer distances. Fiber-optic cables use light to transmit data, which allows signals to travel much further without any degradation compared to copper cables that use electrical signals. This property is called low loss, and it makes fiber-optic cables superior for long-distance communication.