What are the three main parts of the sun

The three major structural areas of the sun are

Core - - The center of the sun, comprising 25 percent of its radius.

Radiative zone - - The section immediately surrounding the core, comprising 45 percent of its radius.

Convective zone - - The outermost ring of the sun, comprising the 30 percent of its radius. Above the surface of the sun is its atmosphere, which consists of three parts

Photosphere - - The innermost part of the sun's atmosphere and the only part we can see.

Chromosphere - - The area between the photosphere and the corona; hotter than the photosphere.

Corona - - The extremely hot outermost layer, extending outward several million miles from the chromosphere.

The core, radiative zone and convective zone.