A systems administrator wants to ensure a system can adjust its resources based on usage. Which of the following will best accomplish this goal?

Anti-affinity is a placement policy that distributes workloads across separate physical hosts for fault tolerance; it does not adjust resource quantities based on usage.

Autoscaling monitors defined metrics such as CPU utilization, memory, or request rate and automatically provisions or removes resources to match current demand. This eliminates manual intervention and ensures the system has the right capacity at any given time. Cloud autoscaling policies can be reactive (threshold-based) or predictive (scheduled or ML-driven), covering a wide range of usage patterns.

Right-sizing is a capacity planning exercise that matches resource allocation to observed needs at a point in time, but it does not provide dynamic or automatic adjustment.

Oversubscription allocates more virtual resources than underlying physical capacity, which is a provisioning strategy, not a mechanism for dynamically scaling resources with usage.