How was the evidence of the big bang called?

There are several main pieces of evidence that support the Big Bang theory. One is the fact that the universe is expanding, proven with something calledred shift. The second is something called cosmic microwave background radiation. The third is the abundance of different elements in the universe.

One of the fact that the universe is expanding proven with something called red shift . second fact is something called cosmic microwave background radiation .the third is the abundance of different elements in the universe 

Where are the options ?

Potato’s are the right way to go promise not apples i’m 5