Final answer:
Lightning can travel through a tree to reach the Earth, despite wood being an insulator. High voltage wires connected to metal-frame towers are held aloft by insulating connectors and are wrapped in an insulating material.
Step-by-step explanation:
True. Lightning can travel through a tree to reach the Earth, despite wood being an insulator. This is because the inner core of a tree is moist and contains ions that allow electricity to pass through it. Additionally, the high voltage wires connected to tall metal-frame towers are wrapped in an insulating material to prevent electrical discharge.