Which statement describes the Sun's core?

• A. The hottest place in the Sun and the source of all the Sun's energy. Very dense
• B. The outer atmosphere
• C. A region where sunspots form
• D. The layer where solar wind originates

Answer: (C)

The Sun's core is the hottest and densest region where nuclear fusion occurs, powering the star. In that inner region, temperatures reach around 15 million degrees Celsius and enormous pressures force hydrogen nuclei to fuse into helium, releasing energy that ultimately drives the Sun’s brightness. That energy then travels outward through the radiative and convective zones until it reaches the surface.

The outer atmosphere is the corona, a hot, tenuous layer above the surface, not the site of energy production. Sunspots form in the photosphere due to intense magnetic activity, not in the core. The solar wind mainly comes from the corona, where magnetic and thermal processes accelerate particles into space. So the description that the core is the hottest place and the source of all the Sun’s energy is the best fit.