Final answer:
b. Convection is the process that involves the movement of a mass or substance and is the correct answer for the given question.
Step-by-step explanation:
The process that involves the movement of a mass or substance is b. convection. This is a type of heat transfer mechanism where the macroscopic movement of a fluid (which may be a liquid or a gas) carries heat along with the moving fluid. For example, in weather systems and forced-air furnaces, convection is responsible for moving heat.
Conduction, on the other hand, is the transfer of heat through stationary matter by physical contact, such as when heat is transferred from a stove's burner to the pan via the bottom of the pan. Radiation involves the transfer of heat through electromagnetic waves, such as the heat from the Sun warming the Earth or the thermal radiation emitted from a human body.
In the context of this question, which asks specifically about the movement of mass, only convection is the correct answer.