A radio button when on the screen is the white circle with the black dot when selected.

A dropdown is a list of options with the arrow on the right to select from the list.

A checkbox is a square box that you can check/uncheck

When a dropdown is the Product Option Name Type ... but there is only 1 choice ... it switches from a dropdown to a selected radio button ... the white circle will have a black center as there is no other choice.

But, if you add another Option Value to this Option Name, then it will go back to being the dropdown as there is now a choice for the customer to make.

The Green/Red/Yellow/etc. colors are just flags or indicators of various settings such as Status being on/off or warnings, cautions or good indicators.

Like if you set a download filename and spell it wrong, you will see a red icon (red circle) next to the name ... if you spell the name right, then the green icon will be next to the name.