Answer:
Earth; heat.
Explanation:
Radiation can be defined as the flow, transmission or emission of energy in the form of atomic and subatomic particles and waves through a material medium or space.
Solar radiation is a form of electromagnetic radiation emitted by the sun on the earth's surface as ultraviolet, infrared and visible light.
Hence, the sun radiates energy towards the earth surface and some of this radiant energy is in the form of heat. Radiation is generally considered to be the least important mode of the transportation of heat from one point to another in planet earth.
