The underlying phenomenon is known as electromagnetic induction.

Explanation:

• The Lenz law says that if a conductor is placed in a magnetic field then EMF is made inside it.

• When the loop closed the current flows from it, that means the current flows from the conductor.

• The phenomenon in which this all takes place is known ad the magnetic field.

"Electromagnetic induction" is the right answer.

Explanation:

• Electromagnetic induction seems to be an immensely valuable process with such a broad range of products. Induction is being used in the generation capacity of electricity, even though it is worth having a look at how this is achieved.
• The mechanism in which those activities occur is referred to as the magnetic field.

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