Based on genomic studies, when did a change in gene sequences occur that lead to a change in the way that the brain processes speech? between 1 and 6 million years ago between 4 and 9 million years ago between 10,000 and 100,000 years ago approximately 25,000 years ago approximately 12,000 years ago

The answer for this question would be the second option. Genomic studies cover the analysis of the changes of genome by scanning the markers across complete sets of DNA. Based on these studies, the change in gene sequences happen that resulted to a change in the way that the brain interprets speech in between 4 and 9 million years ago.