Final answer:
The spinning of the magnet within the coil of copper wire induces an electric current through electromagnetic induction, generating electricity.
Step-by-step explanation:
When the blades of a wind turbine spin due to the force of the wind, this leads to the rotation of a magnet attached to the shaft of the turbine. As this magnet spins inside a coil of copper wire, it produces a changing magnetic field through the coil. This changing magnetic field then induces an electric current in the copper coil, a process known as electromagnetic induction. As a result, electricity is generated, which can then be fed into the electrical grid to power homes, businesses, and various other entities.