Concept:The molecular theory of matter explains phenomena involving particles, but radiation is an electromagnetic wave process, not a particle (molecular) movement.
Explanation:Conduction can be explained by molecules vibrating and passing kinetic energy to neighbouring molecules.
Convection is explained by the bulk movement of molecules in fluids due to differences in density.
Expansion is explained by molecules moving faster and taking up more space when heated.
Radiation transfers energy by electromagnetic waves and does not require molecules or a material medium.
Therefore, radiation cannot be explained by the molecular theory of matter.
Answer:D. Radiation