Question

what is radiation?
oa transfer of heat through space
ob transfer of heat by air currents
oc transfer of heat by the collision of atoms
od transfer of heat by water molecules entering the atmosphere

Explanation:

Radiation is the transfer of heat through space via electromagnetic waves. Option A correctly describes this. Option B is convection (heat transfer by air - currents), option C is conduction (heat transfer by atom - collision), and option D is related to evaporation and heat transfer in the water - cycle but not radiation.

Answer:

A. transfer of heat through space