How does the universe expanding support the Big Bang Theory? A. This piece of evidence indicates that once atoms formed, the first light was carried through space evenly

B. This piece of evidence indicates there was a huge explosion during the first stages of the universe,
C. This piece of evidence indicates that the universe formed from hot plasma, forming the simplest and lightest elements first
D. This piece of evidence indicates that the expanding galaxies must have come from a single point.

when sentence talks about expanding universe the mean that it has been growing ever since its beginning with the Big Bang The Galaxy outside of our own are moving away from us and the ones that are for this away are moving the fastest

radiative zone

explanation    

radiative zone is the layer of the sun which energy is transferred away from the core by radiation. although, the core is the only part of the sun that produces an appreciable amount of heat through fusion. in fact, 99% of the energy produced by the sun takes place within 24% of the sun's radius.