The solar interior refers to the inner structure of the Sun, which is composed of several layers. These layers include the core, where nuclear fusion occurs, producing energy; the radiative zone, where energy moves outward through radiation; and the convective zone, where hot plasma rises and cooler plasma sinks, creating convection currents. Understanding the solar interior is crucial for studying solar phenomena and their effects on the solar system. The energy produced in the core eventually reaches the surface, contributing to solar emissions like solar flares and sunspots, which can impact space weather and Earth's atmosphere.