I’m bit confused because that’s not how I understood the idea of having a biological basis. If the point was "The way you emit and understand sound has a basis

I’m bit confused because that’s not how I understood the idea of having a biological basis. If the point was "The way you emit and understand sound has a basis in your brain structure and its development", the answer is obviously yes like everything humans do as has been known for decades and is trite. I thought we were considering the idea that structures helping develop an accent rather than other might be inherited as sort of extension to Chomsky theory of language. Which would be an idea somewhat worth considering but easily disprovable.