it's kinetic energy carried over magnetic fields, which can be induced as toroidal fields around a conductor while the force is transferred (current is being carried)

kinetic energy, or force, causes a change in the structure of matter in some way

it's an interesting thing, someone did an experiment with very long wires, on one side, battery, several kilometers of cable on each side, and a lightbulb on the other side of the loop, right next to the battery

guess how long the light took to turn on, given that the speed of light for the several kilometers distance was a few milliseconds

yeah, instantly, like the wires were centimetres long

my personal theory is that magnetic fields are actually electrons in pairs rotating in opposite direction to each other, and force can be transferred faster than light because it's caused by rotations of the field which have zero time of travel

keeping this in mind, note that the entire galaxy is a connected magnetic field and so are all the galaxies connected to each other, the entanglement and reverse time experiments prove that information can actually be carried without time or energy cost, and our digital encoded signaling systems flints and charcoal compared to what will be possible eventually (and probably already happening inside our noggins)