Question

rearrange - took place/ the big bang/ ago/ was a sudden expansion/ 4 millions years/ about / that

Answer 1

$\huge\mathtt\pink{Answer}$..

As space expanded, the universe cooled and matter formed. One second after the Big Bang, the universe was filled with neutrons, protons, electrons, anti-electrons, photons and neutrinos.

Answer 2

The Big Bang was a sudden expansion that took place about 14 million years ago.