Final answer:
Neither the Supervision model nor the Administrative model is specifically a probation and parole volunteer model; these terms describe broader systems of managing individuals on probation or parole and can include professional staff and volunteers.
Step-by-step explanation:
The question of which model is a probation and parole volunteer model relates to the types of models used in the criminal justice system for supervising individuals who are on probation or parole. Among the options listed, the correct answer is neither a) the Supervision model nor b) the Administrative model specifically. These are more general models for probation and parole systems, rather than volunteer models. Volunteer models can vary and are not defined strictly by Supervision or Administrative models. Probation and parole systems can indeed involve volunteer work, but this is usually a component of broader models that include professional staff as well. In most cases, volunteers are there to supplement the work of the professionals by providing additional services or support to those on probation or parole.