Cloud computing has the capability to meet increased and decreased demands for computing infrastructure for a short period of time. Which of the following best describes this characteristic?

Efficiency refers to performing tasks with the least waste of time and effort, which is a general benefit of cloud computing but not the specific characteristic of meeting fluctuating demand.

Elasticity describes the cloud's ability to quickly and automatically provision and de-provision computing resources, like CPU, memory, and storage, in response to real-time changes in workload demand. This allows for rapid scaling up or down as needed, ensuring optimal performance and cost efficiency for varying short-term requirements.

Multitenancy is a cloud characteristic where multiple customers share the same underlying infrastructure while keeping their data isolated, which is unrelated to adapting to demand changes.

Scalability is the ability of a system to handle a growing amount of work by adding resources, but elasticity specifically implies automated and rapid scaling to meet both increases and decreases in demand for short periods, distinguishing it from general scalability.