Question

the big bang model predicts a 3:1 ratio of what two elements in the universe at large? lithium: hydrogen hydrogen: lithium hydrogen: helium helium: hydrogen rewatch

Explanation:

The Big Bang model predicts a 3:1 ratio of hydrogen to helium (by mass) in the universe. Among the options, "hydrogen: helium" (the third option) matches this prediction. The other options involve lithium which is not part of the 3:1 ratio predicted by the Big Bang for the main primordial elements.

Answer:

C. hydrogen: helium (assuming the third option is labeled as C; if the original options had no labels but the third one is "hydrogen: helium", then "The third option (hydrogen: helium)")