Everything in the Universe originated from a single point. How was it possible for everything in the Universe to have occupied a single point?

Question

A.
All mass in the Universe was once energy, and energy does not take up space.
B.
Only single atoms existed in the Universe, and they were squeezed together by magnetic fields.
C.
All mass in the Universe was in the form of gases, and gases take up minimal space.
D.
Only protons and electrons existed in the Universe, and they were pulled together by gravity.

Answer 1

The correct option is:

A. All mass in the Universe was once energy, and energy does not take up space.

This idea is consistent with the concept that, according to the Big Bang theory, the Universe began from an extremely hot and dense state where all the mass-energy was concentrated in a very small volume. Before the Big Bang, the distinction between mass and energy was not applicable in the same way as it is in our current understanding of physics. As the Universe expanded, energy converted into matter and eventually formed the stars, galaxies, and other structures we observe today.