Security and audit logs is the correct option.

Security and audit logs provide the primary record of system and user activity that security architects need to detect threats respond to incidents and perform forensic investigations. Logs supply time stamped evidence of events across systems and networks and they support monitoring alerting compliance and retrospective analysis.

Establishing logging as a priority ensures that log collection centralization retention and access controls are designed into the architecture rather than bolted on later. That makes detection and incident response more effective and it also helps meet regulatory and audit requirements.

Input validation routines are important for secure coding and preventing injection and other application level attacks. They are not the primary artifact asked for in this question because they are application controls rather than a record of system events.

Identity and access management policies define who may access what and under what conditions and they are essential for a secure architecture. The question asks about a record or artifact to establish as a priority and IAM policies are governance artifacts while logs are the operational records needed for detection and auditing.

Change control processes provide structure for modifying systems and maintaining integrity and they are important for security change management. They are processes and supporting documentation so they do not serve as the continuous evidence stream that audit logs provide for monitoring and incident response.

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