Heat transfer that involves actual movement or circulation of a substance is known as

convection heat transfer .

Explanation:

Convection heat transfer -

It is the transfer of the heat from one place to the other via the fluid movement .

It is one of the dominant method of heat transfer in the gases and liquids .  

The process of heat transfer involves , the actual circulation or movement of the substance .

hence , from the given statement the answer is convection heat transfer .