A company uses cloud tools to respond quickly to changing market demands. Which cloud benefit enables that responsiveness?

Agility is the correct answer because it refers to the cloud's ability to rapidly provision and de-provision resources, scale services up or down, and adapt to evolving business needs and market changes. This responsiveness is a core benefit of cloud computing. Redundancy and fault tolerance are related to ensuring high availability and resilience by duplicating resources and designing systems to withstand failures, but they don't directly describe the ability to quickly adapt to market demands. On-premises integration describes connecting cloud resources with existing on-site infrastructure, which is a hybrid cloud scenario, not a direct benefit enabling rapid market responsiveness.