Material Design Select box /Dropdown Usability which is correct interaction

I like material design, when using one of the material design components (select box/dropdown), I got confused about which interaction is correct, the link below has 2 interactions filled and filled enhanced. If you click on the filled examples the dropdown box list covers the field label, on the other hand, the list item is opening below the dropbox, which help the user to read the field label easily. So which is the correct interaction for this component? Or does simply saying filled enhanced mean that the correct interaction has been updated?

https://material-components.github.io/material-components-web-catalog/#/component/select