To pass electric current from one body to another, the two bodies must be joined by a copper wire.
Explanation: Copper is a good conductor of electricity, meaning it allows electric current to flow through it easily, while materials like cotton thread, plastic string, and rubber bands are insulators, meaning they do not allow electricity to flow freely.
Key points:
Conductor: A material that allows electric current to flow through it.
Insulator: A material that does not allow electric current to flow through it.