Final answer:
The basic function of the presentence investigation report is to provide judges with information about offenders to help them develop a plan of supervision for the offenders after they are placed on probation.
Step-by-step explanation:
The basic function of the presentence investigation report is to provide judges with information about offenders to help them develop a plan of supervision for the offenders after they are placed on probation. This report includes details about the offender's background, such as their criminal history, personal life, and potential risk factors. By considering this information, judges can make informed decisions about the appropriate conditions of probation and supervision for each offender.