Ok well first to the person above.
How is this in the wrong section? its biology.
And the english is correct. i understood it.
She is simply asking what contributions they made in the hypothesis.
im not entirely sure if this is right or not but i think it may be that they showed that amino acids, nucleic acids and other simple organic molecules could be combined naturally under primordial conditions. Miller hypothesized that a mixture of water, methane, ammonia and hydrogen resembled the atmosphere of early earth.
There is probably way more detail to it than that and again im not sure if thats right but yea.