Question

which of the following requires no medium to take place?

Answer 1

Hey dear!!
________________________________________________________________________

Your question is not too specific, but I think your question could be reframed as follows:

Which of the following requires no medium to take place?
(a) Conduction
(b) Convection
(c) Radiation




Answer:

Radiation does not require any medium to take place. Radiation is the process by which heat is quickly transferred in all directions at a great speed. 

Conduction and convection both require a medium to propagate through.

I hope this was the answer to your question!
______________________________________________________________________________

Hope helped!!