Which best describes a characteristic of an adiabatic process?

In an adiabatic process, no heat enters or leaves the system. By the first law of thermodynamics, any energy supplied through heat is zero, so work and changes in the system’s internal energy account for the energy changes instead. Choice D is not a correct definition as written: it describes heat being converted to work, whereas an adiabatic process involves no heat transfer. None of the choices correctly describes an adiabatic process.

AI-written and checked against the verified answer.