According to the big bang theory, how long ago did the universe expand explosively into existence? a- 54.8 billion years ago b- 27.4 billion years ago c- 6.9 billion years ago d- 13.7 billion years ago

D- 13.7 billion years ago

Explanation:

According to the big bang theory, the universe started its life approximately 13.7 bilion years ago. Initially, all the matter and the energy of the universe was concentrated in a single point of infinite density, called singularity. Then, a huge and fast expansion occurs, and the universe expanded at a very fast speed: matter and energy started to separate, and they started to form the subatomic particles that we know, then atoms, molecules, and then bigger objects, such as stars and galaxies.

i'm only doing this for the points : (

explanation:

i'm only doing this the points

energy can be converted from one form to another, but it cannot be created or destroyed in ordinary chemical or physical means. do not understand what you are asking but hope this