Which configuration approach involves adding more server resources based on observed trends?

The configuration approach that involves adding more server resources based on observed trends is effectively vertical scaling based on those trends. Vertical scaling, also known as scaling up, entails enhancing the capacity of existing servers by adding more powerful resources, such as CPU, RAM, or storage, to accommodate increased demand. When a trend indicates that resource usage is consistently rising, administrators can proactively increase capacity by upgrading existing hardware or virtual instances.

This method contrasts with horizontal scaling, which adds more servers to distribute the load, and dynamic resource allocation, which adjusts resources in real-time based on current demand. Auto-scaling also automates the process of scaling resources, but it typically reacts to current loads rather than being based on long-term observed trends. Thus, the choice indicating vertical scaling based on trends correctly identifies an approach focused on planned capacity increases in response to predicted demand increases.