Which of the following services provides comprehensive security features on Alibaba Cloud?

Security Center is the service that provides comprehensive security features on Alibaba Cloud. It offers a range of security capabilities designed to help users protect their cloud environment effectively. This includes threat detection, vulnerability scanning, and security audits that help ensure the security of cloud resources.

Security Center is specifically built to monitor and manage security risks, enabling users to get insights into potential vulnerabilities and threats. It integrates various security functions, such as anti-virus, intrusion detection, and compliance management, making it a holistic security solution for cloud workloads.

In contrast, while the other services listed may offer certain security functionalities, they do not focus primarily on security management as Security Center does. For instance, Server Load Balancer is primarily used for distributing network traffic and improving service availability, Cloud Database Service manages data storage and retrieval but does not specifically provide overarching security features, and Elastic Compute Service focuses on providing virtual computing resources without being a dedicated security solution.