Final answer:
The high-voltage wires connected to tall metal-frame towers are held aloft by insulating connectors and wrapped in an insulating material for safety and efficiency.
Step-by-step explanation:
The correct answer is true. The high-voltage wires connected to tall metal-frame towers are indeed held aloft by insulating connectors and wrapped in an insulating material. This insulation helps to prevent the wires from coming into contact with the tower or any other objects, ensuring safety and proper functioning of the electrical system.