The glowing surface of the sun is called:

Correct option is D

• The photosphere is the visible surface of the Sun from which light is emitted. It is not a solid surface but a layer of gas, and it appears as a bright,glowing layer when viewed from Earth. 
• The temperature of the photosphere is approximately 5,500°C (9,932°F).

• The photosphere is often referred to as the Sun's "surface," even though it is not a solid surface.
• It marks the point where light from the Sun becomes transparent enough to escape into space.
  

• Corona: The outermost layer of the Sun’s atmosphere, visible during a total solar eclipse, is much hotter than the photosphere.
• Chromosphere: A layer above the photosphere that gives off a reddish glow due to the presence of hydrogen gas.
• Lithosphere: Refers to the solid outer layer of the Earth, not related to the Sun.