Question

in the big bang model, the ratio of hydrogen to helium in the universe is approximately 3:1. why is this specific elemental concentration considered strong evidence for the theory? it matches the mathematical predictions of nuclear fusion during the first few minutes of the universe’s expansion. it suggests that the universe will eventually run out of oxygen. it proves that stars have been burning for trillions of years. it shows that all galaxies are made of the exact same types of rock.

Explanation:

The observed 3:1 hydrogen to helium ratio matches the precise mathematical calculations of how nuclear fusion would have produced these elements in the first minutes after the Big Bang, which is key supporting evidence for the model. The other options are incorrect: the ratio does not relate to oxygen depletion, star burn time, or galaxy rock composition.

Answer:

It matches the mathematical predictions of nuclear fusion during the first few minutes of the universe's expansion.