Why is the temperature of the solar corona higher than the surface temperature of the sun?

The corona temperature is above a million degrees, which significantly exceeds the temperature of the photosphere (6000C. Additional heating occurs due to the transfer of kinetic energy of convective motions of sub-photospheric layers into heat.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.