The conditions in the sun are incredible. Ultra-high temperatures and densities. Particles move around very fast and collide. This is what allows nuclear Fusion to occur in the core. In the convective zone the electrons can combine with nuclei to make atoms.
Energy is absorbed by atoms.
The absorbed energy sets solar gas moving like water in a pot. We can visualize the upper interior as a boiling, seething sea of gas. Each convective loop is about 1000 km across. The convective cells are arranged in tiers with cells of progressively smaller size as the surface is neared. This is what produces the granulation of the solar surface The Granulated Photosphere - Skylab photograph of the granulated solar photosphere.