The convection is driven by temperature differences within a fluid. Hence, the last option is correct.
What is convection?
Convection refer to the heat transfer process via the bulk movement of molecules that arise within the fluids like the gases and liquids.
The initial heat transfer should be lies between the object and the fluid takes place via conduction, however, the bulk heat transfer arise because of the motion of the fluid.
hence, the last option is correct.
Learn more about convection here: https://brainly.com/question/24193059
