The transmission of heat requiring the movement of a liquid or a gas is

a. convection.

b. conduction.

c. transduction.

d. radiation.

A. Convection

Convection is the method of heat transfer through fluids such as water or air, in which there is a macroscopic movement of the fluid itself. Heat is transferred via convection currents that are set up in the fluid, which leads to uniform distribution of heat throughout.