Final answer:
The high-voltage wires are supported by insulating connectors but are not wrapped in insulating material, they are bare and rely on air as an insulator.
Step-by-step explanation:
The statement, 'high-voltage wires connected to tall metal-frame towers are held aloft by insulating connectors, and these wires are wrapped in an insulating material,' is false. The wires held aloft by the towers are indeed supported by insulating connectors, which prevent the electricity from traveling down the towers and into the ground. However, the wires themselves are not wrapped in an insulating material. Instead, they are bare, relying on the air surrounding them to serve as an insulator. Moreover, the air space around the wires safeguards against electrical current being conducted to unintended objects or surfaces.