Step 1: Understanding the Concept
In an adiabatic process the system is thermally insulated, so \( q = 0 \).
Step 2: Other Processes
Isothermal means constant temperature, isobaric means constant pressure and isochoric means constant volume.
Step 3: Compare the options
The answer is the adiabatic process, option (D).
Final Answer:
The adiabatic process has no heat exchange.
\[ \boxed{\text{(D) }\text{Adiabatic process}} \]