What are Oracle Cloud Infrastructure's Security Zones used for?

The correct choice highlights that Oracle Cloud Infrastructure's Security Zones are designed specifically for defining policies that help ensure security compliance. Security Zones provide a framework to govern resource deployments by enforcing best practices and compliance requirements. They help organizations maintain their security posture by ensuring that resources are deployed according to established policies, which is crucial for protecting sensitive data and meeting regulatory requirements.

By establishing such zones, users can automatically restrict certain types of resources or configurations that might not meet their security standards. This ensures that any service or infrastructure deployed within the OCI aligns with compliance mandates and security protocols, thereby reducing the risk of vulnerabilities.

In contrast, the other options are associated with different functionalities within OCI. For example, while setting up virtual networks is an essential task for resource connectivity and communication, it doesn't directly relate to security compliance. Managing application performance focuses on optimizing application delivery rather than security. Creating backups is essential for data recovery but not directly linked to the enforcement of security policies. Each of these activities, while important in their own right, does not encapsulate the primary purpose of Security Zones.