An IT manager explains that using cloud services aligns IT spending with actual usage and reduces costs during low demand. Which core financial principle of cloud computing is being described?

The IT manager is describing the consumption-based model, a core financial principle of cloud computing. This model means you only pay for the cloud resources you use, when you use them. This aligns IT spending directly with actual usage, making it cost-effective during periods of both high and low demand. Capital Expenditure (CapEx) involves upfront spending on physical infrastructure, which is the opposite of the cloud's operational expenditure (OpEx) model. A Fixed-Cost Model implies consistent, predictable costs regardless of usage, which doesn't allow for cost reduction during low demand. Resource Depreciation relates to the decrease in value of assets over time, not a financial model for cloud services.