The correct answer is A. Gauss’s law.
Gauss’s law is a law of physics that relates the electric field to the electric charge. It states that the electric flux through a closed surface is proportional to the total electric charge enclosed by the surface. The electric flux is the surface integral of the electric field over the surface.
Kirchhoff’s law is a law of physics that relates the current to the voltage and resistance in an electrical circuit. It states that the sum of the currents entering a node is equal to the sum of the currents leaving the node.
Faraday’s law is a law of physics that relates the electric field to the magnetic field. It states that the change in the magnetic flux through a closed surface induces an electric field in the surface.
Lenz’s law is a law of physics that relates the induced electric field to the change in the magnetic flux. It states that the induced electric field is in a direction that opposes the change in the magnetic flux.