Guess the correct answer and let the others to proof that your and other historic proposals were right.
This is physicist brain nut (originally for X-Mas freetime 2023). Idea is to go to simplify existing thinking models from energy, space and electromagnetism. Created text is quite short, and includes some imperfections, anyhow it's now best what I can offer in available time; An puzzle you could ponder with your freetime.
Here is document: general.pdf
Have a nice day :-).