The warmth of the sun is an example of which type of heat transfer?

The warmth of the sun is an example of radiation because it involves the transfer of heat through electromagnetic waves. Unlike conduction, which requires direct contact between materials to transfer heat, and convection, which relies on the movement of fluid or gas to distribute heat, radiation allows heat to travel through the vacuum of space. This is how solar energy reaches the Earth, warming everything in its path without needing a physical medium. Insulation refers to materials that prevent heat loss or gain, which is not a mechanism of heat transfer like the others. Therefore, radiation accurately describes the process of solar warmth reaching and heating the Earth's surface.