Final answer:
Convection heat flux is a method of heat transfer that occurs through the macroscopic movement of a fluid. It is relevant in heat transfer as it allows heat to be transferred from a surface area A to the surrounding fluid.
Step-by-step explanation:
Convection heat flux is a method of heat transfer that occurs through the macroscopic movement of a fluid. It is a process where heat is transferred from a surface area A to the surrounding fluid through the movement of the fluid particles. This type of transfer commonly occurs in forced-air furnaces and weather systems.