Final answer:
The statement about high-voltage wires being wrapped in insulating material is false; they are held aloft by insulators but the wires themselves are bare.
Step-by-step explanation:
The statement that the high-voltage wires connected to tall metal-frame towers being held aloft by insulating connectors and these wires being wrapped in an insulating material is false. In reality, while it is accurate that insulating connectors, or insulators, are used to secure the wires to the towers, the wires themselves are not wrapped in insulating material. Instead, these high-voltage wires are typically bare and their insulation comes from the air gap provided by the insulators that ensure the wires do not touch the towers, which could lead to electrical grounding and power losses.