Describe how the student could use this equipment to show the
shape of the
magnetic field produced by a current in the wire.
you may draw a diagram to with your answer.

Any current carrying conductor produces a magnetic field circulating around itself according to the grip version of the Right-hand rule (if the conventional current is in the direction of the thumb, the fingers curl in the direction of the magnetic field).

it's c. (to reduce the greenhouse effect/carbon gasses)