A retail company needs infrastructure that automatically scales up for holiday shopping peaks and scales down afterward. Which cloud benefit is most relevant?

Scalability is the ability of a system to handle a growing amount of work by adding resources. In this scenario, the retail company needs to increase resources (scale up) during peak holiday shopping and decrease them (scale down) afterward, which directly aligns with the definition of scalability. Fault tolerance refers to a system's ability to continue operating despite the failure of one or more components. Availability ensures that a system is operational and accessible when needed. Disaster recovery involves strategies to restore operations after a catastrophic event. While these are important cloud benefits, they do not directly address the need to dynamically adjust resources based on fluctuating demand like holiday shopping peaks.