Final answer:
The last step in the SDLC that includes a system audit and an evaluation phase is referred to as maintaining the system, which ensures the system's continual alignment with an organization's needs.
Step-by-step explanation:
The final step in the System Development Life Cycle (SDLC) is referred to as maintaining the system. This step includes a system audit and an evaluation phase to ensure that the system continues to meet the necessary requirements and operates efficiently. Maintenance can involve correcting issues, making updates, and potential enhancements to improve system performance and address new business or technical requirements.
Understanding this final phase of the SDLC is critical as it ensures that the system remains useful and relevant over time. Regular maintenance activities are an integral part of keeping an information system in alignment with an organization's evolving needs.