Correct answer only ! i cannot retake this and i need all correct answers !

bar magnets have poles.

Bar magnets have 2 poles, North and South. When you suspend it freely, the magnet aligns itself so that the north pole points towards the magnetic north pole of the earth.

a

explanation:

no diagram was provided, but i'm guessing it's the one i've attached to my answer.

here, a mechanical force turns the rod.   this generates an electric current in the coil, which powers the bulb.

dang that balls went far