>>13791240As another anon here stated, energy is just the capacity to do work, which is defined most commonly as just force by distance.
The electrical signals are energy, the heat generated by them is energy, all of that energy is itself derived from processing of chemical energy in food/drink, your shit also has chemical energy. If you want to go with this, every time you exert any work on your environment, every moment your body temperature is different from the environment, every instant you're not dead you're "reincarnating" into everything around you by that logic.
