Heat transfer from the sun to the moon is mostly through the process of *
radiation
radioactivity
conduction
refraction
convection

Heat transfer from the Sun to the Moon is mostly through the process of Radiation.

Explanation:

In space, the heat is being transferred through the process of radiation. There is no atmosphere in the moon so it will get heat or cool by the process of conduction or convection.

In space, heat gets transferred by radiation which mainly takes place in the infrared band of electromagnetic waves. Radiation can transmit heat by the electromagnetic wave. It can take the heat transfer process in the vacuum.