The risk likelihood is the element of the risk register that should be updated to reflect the change of implementing encryption on all databases that host customer data. The risk likelihood is the probability or frequency of a risk event occurring, and it is one of the factors that determine the risk level and priority. By implementing encryption, the organization reduces the risk likelihood of unauthorized access, disclosure, or breach of the customer data, as encryption protects the data from being read or modified by anyone who does not have the decryption key. Therefore, the risk likelihood should be updated to reflect the lower probability of the risk event after applying the encryption control. The other options are not the elements that should be updated, as they are either not affected by or not related to the change of implementing encryption. The inherent risk is the level of risk before applying any controls or mitigation measures, and it does not change after implementing encryption. The risk appetite is the amount of risk that the organization is willing to accept in pursuit of its objectives, and it is not influenced by the change ofimplementing encryption. The risk tolerance is the acceptable variation between the risk thresholds and thebusiness objectives, and it is not determined by the change of implementing encryption. References = Risk Register: A Project Manager’s Guide with Examples [2023] • Asana; Risk Assessment in Project Management | PMI; Risk Assessment Process: Definition, Steps, and Examples; Risk Assessment - an overview | ScienceDirect Topics