Answer: Find the answer in the explanation
Explanation:
The earth wire act as a protective conductor in which current flows to the earth. Whenever there is a faulty flow of current, the earth wire will protect an iPad with a metal casing from letting you get shocked by allowing the faulty current to flow directly to the earth.
With the use of fuse, the wire break when it detects a faulty flow of current and the device will automatically switch off because of break in circuit.
These are to protect you from electric shock from the iPad metal casing.