Final answer:
External hardware can be connected wirelessly, which is true. The claim that high-voltage wires are wrapped in an insulating material is false. The fact that lightning can travel through a tree despite wood being an insulator is true.
Step-by-step explanation:
External hardware can indeed be connected to a device without wires or cables, which is true. This is done using wireless technology such as Bluetooth, Wi-Fi, infrared, or other forms of wireless communication protocols. Devices such as wireless keyboards, mice, printers, and headphones are common examples of hardware that can connect wirelessly to computers or other devices.
Regarding the question on high-voltage wires, the statement is false. The high-voltage wires seen on metal-frame towers are not wrapped in an insulating material due to the very high voltages they carry and the impracticality of such an insulation method. Instead, they are held aloft by insulators that are designed to prevent the current from traveling down the tower structure to the ground.
The statement regarding wood being an insulator but lightning being able to travel through a tree to reach Earth is true. Although wood is generally an insulator, the intense heat and electrical energy of lightning can ionize the air and create a conductive plasma channel, allowing it to pass through a tree and into the ground.