Which of the following describes a benefit of using cloud computing?

The benefit of using cloud computing that stands out is the flexibility to scale resources on demand. This capability is one of the core advantages of cloud services. Businesses can easily increase or decrease their computing resources based on current needs without the need for physical hardware purchases or long-term commitments. This elasticity allows organizations to respond swiftly to changing workloads, ensuring they have the necessary resources during peak times and can reduce them when demand falls.

In contrast, guaranteed control over all physical servers is not typically a characteristic of cloud computing, particularly in public cloud environments, where users do not have direct control over physical infrastructure. Fixed pricing regardless of usage can often lead to inefficiencies in resource allocation and is less common in cloud models where pricing usually reflects actual resource consumption. Additionally, while isolation from other users' data is important for security, it does not capture the primary advantages that drive the adoption of cloud solutions, which center around flexibility, scalability, and cost-effectiveness.