Answer:
A. The amount of current in the wire
Explanation:
When you put the current-carrying wire in a loop shape, it will make a magnetic field. The direction of the magnetic field can be determined by the second right-hand rule. There are a few variables that can influence the strength of the field. The more current flowing on the wire, the stronger the magnetic field. Each loop will create a magnetic field, so more loop count will also increase the strength of the magnetic field.
