Method of heat transfer?

Question

State the method of heat transfer by

a)that does not require particles
b)that works because particles collide with their neighbors
c)in which thermal energy travels at the speed of light
d)that works when particles circle in a path


Thanks in advance.

Answer 1

a) Radiation
b) Conduction
c) Radiation
d) Convection

Answer 2

a)...Radiation.
b)...Conduction.
c)...Vacuum.
d)...Convection.