Final answer:
The correct answer is c) Isothermal process. An isothermal process is a thermodynamic process that occurs at a constant temperature.
Step-by-step explanation:
The subject of this question is Physics.
The correct answer is c) Isothermal process. An isothermal process is a thermodynamic process that occurs at a constant temperature. During an isothermal process, the system's temperature remains constant, which means there is no change in internal energy. This process can be represented on a pV diagram as a horizontal line.
In contrast, an isobaric process is a process where the pressure of the system does not change, an adiabatic process is a process where no heat is transferred to or from the system, and an isometric process is a process where the volume of the system does not change.