Final answer:
The high-voltage wires connected to tall metal-frame towers are not wrapped in an insulating material.
Step-by-step explanation:
False. The high-voltage wires connected to tall metal-frame towers are not wrapped in an insulating material, but rather they are suspended by insulating connectors to keep them away from the tower and the ground. The insulating connectors prevent the electricity from flowing through the tower and ensure that the wires remain aloft.