Transfer of heat by convection can take place in

Which one of the following heat transfers is an example of convection ?

Which of the following is not a method of heat transfer?

The process of heat transfer from one point to another in a fluid due to the differences in fluid density is called:

The process of heat transfer through a solid material without any flow of the material itself is called:

The ratio of the amount of heat absorbed by a substance to the corresponding rise in temperature is called its: