Final answer:
The sentencing ideology that says punishment must be dependent on the culpability of the offender and the seriousness of the offense is known as proportionality.
Step-by-step explanation:
The sentencing ideology that says punishment must be dependent on the culpability of the offender and the seriousness of the offense is known as proportionality. It promotes the principle that the punishment should fit the crime, taking into account the individual's level of responsibility and the severity of the offense committed. This approach aims to ensure fairness and avoid excessive or inadequate punishments.