Final answer:
The high-voltage wires connected to metal-frame towers are held aloft by insulating connectors and wrapped in insulating material.
Step-by-step explanation:
True - The high-voltage wires that you see connected to tall metal-frame towers are indeed held aloft by insulating connectors, and these wires are wrapped in an insulating material. The insulating connectors prevent the wires from making direct contact with the metal-frame towers, which could result in electrical current flowing through the towers and creating safety hazards. The insulating material wrapped around the wires provides an additional layer of protection against electrical leakage or short circuits.