Question

i. ii. iii. iv. conduction convection radiation convection and radiation

Explanation:

I. shows fluid - like movement due to temperature differences, which is convection. II. shows heat transfer through a medium like air rising, which is also convection. III. shows heat transfer from the sun to the Earth without a medium, which is radiation. IV. shows heat transfer both by the movement of air (convection) and the transfer of heat in the form of electromagnetic waves (radiation).

Answer:

I. Convection
II. Convection
III. Radiation
IV. Convection and Radiation