Which concept allows business computing resources to grow quickly with changing demands?

Scalability is the concept that enables business computing resources to grow quickly in response to changing demands. It refers to the ability of a system to handle increased loads by adding resources or enhancing existing ones without requiring significant reconfiguration or downtime. Scalability can be vertical, meaning increasing resources on existing machines, or horizontal, which involves adding more machines to expand capacity.

In cloud computing, scalability is particularly vital because businesses experience fluctuating workloads, seasonality, and varying user demands. Scalable systems can efficiently adjust to these changes, allowing organizations to maintain performance levels and manage costs effectively by only paying for resources that are needed at any given time. This characteristic aligns closely with the flexible nature of cloud services, which are designed to accommodate varying usage patterns seamlessly.

Other concepts such as confidentiality, integrity, and availability focus more on the security and reliability of data rather than on the flexible scaling of resources, which is the central theme of scalability.