How does the abundance of hydrogen and helium support the Big Bang theory?

Hydrogen and helium are elements on the periodic table.
Hydrogen and helium have many current uses today.
Hydrogen and helium are in the same ratio throughout the universe.
Hydrogen and helium are both lighter elements

that were formed during the Big Bang. The abundance of hydrogen and helium in the universe supports the Big Bang theory because it suggests that the universe began as a hot, dense state in which hydrogen and helium were the only elements that could be formed. As the universe expanded and cooled, these elements began to coalesce and form stars, eventually leading to the formation of other elements through processes like nuclear fusion. The fact that hydrogen and helium are in the same ratio throughout the universe also supports the idea that they were formed in a single, unified event like the Big Bang.