What does quantas?

Answer 1

Probably a mis-spelling of "quanta". This is the plural of "quantum" - the idea, in quantum theory, that many quantities in our Universe can't be subdivided indefinitely, but rather, they come in "discrete packets".

Photons, because higher frequencies have more energy higher frequency light is more energetic. Flames are simply excited electron releasing energy in the form of light. Energy progresses from red to violet in terms of visible light because violet has shorter wave length and hence higher frequencies.

Also note that in the science of quantum mechanics, all forms of matter, energy, space and time are divided into small packages called quanta. The whole point is that physical quantities, unlike mathematical quantities, are not infinitely subdivisible. There is a limit to how small something can be, and that limit is a quantum.