how does astronomical data support the big ba...

# Brief Explanations: Astronomical data such as cosmic - microwave background radiation (a nearly uniform glow of radiation filling the universe, a remnant of the early hot and dense state), the abundance of light elements (like hydrogen, helium, and lithium, which were produced in the early universe through nuclear reactions), and the redshift of distant galaxies (indicating the expansion of the universe, consistent with the Big Bang's prediction of an expanding cosmos) support the Big Bang Theory. # Answer: Cosmic - microwave background radiation, abundance of light elements, and redshift of distant galaxies are astronomical data that support the Big Bang Theory.