Which feature supports the ability to automatically adjust resources on Alibaba Cloud?

The ability to automatically adjust resources on Alibaba Cloud is best supported by auto-scaling. This feature allows users to dynamically increase or decrease the number of compute resources based on current demand, ensuring that applications maintain performance during high traffic periods while avoiding unnecessary costs during low traffic times.

Auto-scaling monitors metrics such as CPU usage, memory consumption, and other defined rules to automatically provision new instances or remove surplus ones. This capability is crucial for maintaining optimal resource utilization, improving application reliability, and enhancing the overall user experience.

In contrast, static load balancing provides a fixed distribution of incoming traffic across servers, which does not adapt to changing demands. Server mirroring creates duplicate instances of a server for redundancy or load distribution but does not provide dynamic scaling based on demand. Cloud storage limits relate to data storage capacity features rather than resource scaling, as they define the maximum data that can be stored rather than how computing resources are managed in response to varying workloads.