Answer:
Adiabatic
Step-by-step explanation:
An adiabatic process is a thermodynamic process in which the system does not exchange heat with its surroundings. An adiabatic process may also be isentropic, meaning that the process may be reversible. The term adiabatic refers to elements that prevent heat transfer with the environment. An insulated wall is quite close to an adiabatic boundary. Hence the term of the adiabatic wall appears.
Air is a bad thermal conductor, this means that air is a system that makes it difficult to change the temperature with the systems around it, so we can conclude that the above question deals with the thermodynamic process called adiabatic.