Question

heat energy can transfer from the sun to the earth. what type of heat transfer is this? radiation both conduction and convection

Explanation:

Heat transfer from the sun to the earth occurs through radiation. Radiation is the transfer of heat in the form of electromagnetic waves (like infrared rays) and can happen in a vacuum (space is mostly a vacuum between the sun and the earth). Conduction requires direct physical contact (not possible between sun and earth as there's no continuous medium for direct contact), and convection requires a fluid medium (air or liquid, which isn't present in the vast space between sun and earth for this heat - transfer path).

Answer:

radiation