Which option allows adding capacity from another cloud service during peak times?

The concept that allows adding capacity from another cloud service during peak times is cloud bursting. This approach is particularly beneficial for applications that experience variable workloads, as it enables dynamic allocation of resources to ensure performance and availability. When an organization is running out of capacity in their primary cloud environment, cloud bursting enables them to leverage additional resources from a secondary cloud provider or environment to handle excess demand.

This mechanism is ideal for scenarios like seasonal spikes or bursts of traffic, where demand suddenly increases beyond the organization's usual capacity. By utilizing cloud bursting, businesses can effectively manage costs by only using the extra resources when they are needed and scaling back once the peak demand diminishes.

Other approaches like elasticity, while related, generally refer to the ability of a cloud environment to dynamically adjust resources automatically based on demand, but do not explicitly imply using another cloud service. Vertical scaling involves adding resources to a single instance rather than distributing load across multiple cloud services, which does not address the need for resource allocation during peak periods in the same way cloud bursting does.