Answer:
The correct option is;
Stream of particles
Explanation:
Light can be observed to behave as stream of particles in the physical phenomenon of blackbody radiation and photoelectric effect whereby electrons are ejected by the impact of light such that the number of electrons ejected is a function of the amount of photons transmitted which are absorbed by the electrons before they can be ejected
The energy of the photons depends on the frequency of the light source of the photons, while the electrons are ejected when the energy of the photon is up to their threshold value
As such light can also be considered as behaving as a stream of particles called photons.