c. Convection
Explanation:Note that:
• Heat transfer involves the movement of heat energy across the molecules of a substance.
,• When snow melts in the sun, there is a movement of heat energy from the air molecules to the snow. This movement of heat from the air also involves the movement of the air molecules
,• Convection is the transfer of heat within a fluid, involving the actual movement of the molecules of the fluid
Therefore, from all the points highlighted above, we can conclude that snow melting in the sun is a good example of heat transfer by convection
