Final answer:
True, the high-voltage wires connected to tall metal-frame towers are held aloft by insulating connectors and wrapped in an insulating material.
Step-by-step explanation:
True
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 material helps to prevent the high voltage from escaping the wires and also protects the wires from atmospheric effects like rain, snow, and wind that could damage them.