which change would reverse the direction of the electric current generated through electromagnetic…

Brief Explanations:

According to Faraday's law of electromagnetic - induction, the direction of the induced current depends on the direction of the magnetic field and the relative motion between the magnet and the conductor. Using the opposite pole of the magnet changes the direction of the magnetic field lines passing through the conductor, thus reversing the direction of the induced current. Moving the magnet slower affects the magnitude of the induced emf and current, not the direction. Using more loops of wire in the solenoid changes the magnitude of the induced emf and current. Using a weaker magnet also affects the magnitude of the induced emf and current, not the direction.

Answer:

using the opposite pole of the magnet