In what cases is convection the main mechanism of heat transfer in the interiors of stars, and in what cases is radiation?

Convection occurs at increased opacity of matter – in the layers of the star more distant from the center, in red dwarfs. At high temperatures, when the substance is transparent, the main mechanism of heat transfer is radiation. Fully transfer of energy in the interiors of stars by convection occurs in stars of two types: supergiants and dwarfs. In other types of stars, convection takes place near the surface, while in the rest of the volume of the star, energy is transferred by radiation.