Which AWS service allows users to download security and compliance reports about the AWS infrastructure on demand?

Explanations:

Amazon GuardDuty is a threat detection service that continuously monitors for malicious activity and unauthorized behavior, but it does not provide on-demand access to security and compliance reports.

AWS Security Hub provides a comprehensive view of security alerts and security posture across AWS accounts, but it does not specifically allow for downloading security and compliance reports on demand.

AWS Artifact is the service that allows users to access and download security and compliance reports about the AWS infrastructure, making it the correct answer.

AWS Shield is a managed DDoS protection service that safeguards applications from DDoS attacks, but it does not provide access to security and compliance reports.