Question

The existence of which aspect of the universe supports the big bang theory

Answer 1

cosmic background radiation is what supports the big bang theory , thats the answer

Step-by-step explanation:

Answer 2

It is the existence of cosmic background radiation that supports the big bang theory within cosmology.
cosmic background radiation redshifted photons that have freely streamed from an epoch when the Universe. From this findings, scientist could argue that in the past there is a huge explosion of energy (from big bang) and the photons is the residuals of that explosion.