When the switch is closed in the circuit below, the buzzer makes a sound.

Question

What causes the buzzer to produce sound?
the movement of air through the wires
the movement of air through the wires

the transfer of chemicals through the wires
the transfer of chemicals through the wires

the vibration of molecules in the wires
the vibration of molecules in the wires

the motion of electrons in the wires

Answer 1

the motion of electrons in the wires